"The crop is subtropical in nature. A hard frost is injurious to it. It requires at least 210 frost-free days and 50 to 100 centimeters of rainfall for its growth. A light well-drained soil capable of retaining moisture is ideally suited for the cultivation of the crop." Which one of the following is that crop ?

Describes jute growing on well-drained fertile floodplain soils and requiring high temperature during growth (links jute to soil and temperature preferences).

A student could combine this with knowledge that subtropical regions have high temperatures and floodplain soils to assess the plausibility of the soil/temperature part of the statement.

Gives jute's preferred temperature range (25–35°C), warns that waterlogging is harmful and states 'Rain below 100 cm is not harmful' (implies tolerance to rainfall levels under 100 cm).

Using a climate map, one could compare regional rainfall and temperatures in jute-growing areas to judge whether 50–100 cm and susceptibility to frost are consistent.

Contains the exact phrasing 'It requires at least 210 frost-free days and 50 to 100 centimetres of rainfall' in a crop-identification question (links those numerical requirements to a crop option list including jute).

A student could check which crop the question designates (by using basic MCQ logic or cross-referencing crop lists) and then map frost-free day and rainfall figures onto jute-growing regions.

Explains that fibre crops (cotton example) are sensitive to frost and that a minimum number of frost-free days is used as a geographical requirement for fibre crops.

A student could generalize that fibre crops like jute may also need long frost-free periods and then compare typical frost-free-day maps to jute cultivation zones.

States that frost-free period and rainfall amount/distribution are key climatic factors determining crop yield (gives a general rule for testing crop-climate claims).

Use this rule plus local climate data (frost occurrence, annual rainfall) for major jute areas to assess whether the stated requirements are reasonable.

States frost and fog are detrimental to sugarcane and describes preferred soils (heavy with good drainage but also grows in medium/light soils with irrigation).

Combine this with a map of frost-prone zones to infer where sugarcane would be injured by hard frost and thus is unlikely to thrive.

Lists sugarcane among crops that suffer great damage from cold waves and ground frost, and notes geographic frost frequency (northern Punjab).

Use regional frost frequency data to estimate necessary frost‑free period for successful cultivation.

Explicitly calls sugarcane 'tropical as well as a subtropical crop' and gives a typical temperature range (21–27°C) and annual rainfall range (75–100 cm).

A student could compare those temperature/rainfall ranges with climatic classifications or location rainfall maps to judge the plausibility of the 50–100 cm and subtropical claim.

Explains that frost-free period is a key climatic factor affecting crop yield (mentions 'frost-free period' as contributing to final yield).

One can combine this general rule with local frost calendars to assess whether a 210-day frost-free requirement is reasonable for a perennial like sugarcane.

Describes sugarcane needing high temperature and 'ample rainfall' and liking soils 'retentive of moisture' (deep nitrate soil), linking crop to moist, well-drained soils.

Relate this soil preference to soil-type maps to judge if 'light well-drained soils that retain moisture' is consistent with known sugarcane growing areas.

Describes tea as an evergreen/tree crop preferring temperatures ~20–27°C, very high moisture (over 200 cm) and well‑drained fertile soils with good water‑holding capacity.

Compare this high rainfall and temperature preference with regional rainfall maps and climate classification to judge the plausibility of the 50–100 cm and subtropical claim.

Gives geo‑climatic requirements for tea: temperature 15–25°C, rainfall 100–150 cm, and well‑drained soils on hilly slopes (explicitly tying tea to hill, well‑drained sites).

Use elevation and slope maps plus regional rainfall data to test whether tea’s typical areas match the claimed rainfall/frost‑free day thresholds.

States succinctly that 'Tea bushes require warm and moist frost-free' (phrase indicates sensitivity to frost and need for frost-free conditions).

Check frost occurrence maps or frost‑day climatologies to assess whether tea‑growing zones meet a ≥210 frost‑free‑day criterion.

Notes tea requires moderate temperatures (about 15°C), heavy rainfall (over 150 cm) and well‑drained highland slopes — linking tea to high rainfall and frost‑free upland areas.

Compare the 'heavy rainfall' (150+ cm) pattern here with the statement's 50–100 cm to see a discrepancy and to guide where to look for corroboration or contradiction.

Explains that some crops (including tea) 'thrive best on elevated ground' and that well‑drained hill slopes are homes to major tea gardens — implying sensitivity to frost (altitude, microclimate matters).

Combine this rule (tea on elevated, well‑drained slopes) with basic topographic/frost‑risk knowledge to infer vulnerability to hard frosts and the likely frost‑free day requirements.