Match List-I with List-II and select the correct answer using the code given below the lists : List-I A. Isobars B. Isohels C. Isochrones List-II 1. Lines of equal time 2. Lines of equal pressure 3. Lines of equal salinity 4. Lines of equal duration of sun- light Code : ABC

The correct matching of meteorological and geographic isolines is as follows: A. Isobars are lines connecting points of equal atmospheric pressure [2]. B. Isohels are lines representing points receiving equal amounts of sunshine or duration of sunlight [t2]. C. Isochrones are lines representing points of equal time-distance from a specific point, such as travel time [t2]. Additionally, lines of equal salinity, mentioned in List-II but not matched to a List-I term in the correct sequence, are known as isohalines [t2]. Therefore, the correct sequence for A-B-C is 2 (Pressure), 4 (Sunlight), and 1 (Time). This corresponds to Option 3. These isolines are essential tools in meteorology and geography for visualizing spatial distributions of atmospheric and temporal data on maps [t1][t6].

Sources

1. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 23: Pressure Systems and Wind System > Isobars > p. 304
2. [2] FUNDAMENTALS OF PHYSICAL GEOGRAPHY, Geography Class XI (NCERT 2025 ed.) > Chapter 9: Atmospheric Circulation and Weather Systems > Horizontal Distribution of Pressure > p. 77