Consider the following pairs : National Highway Cities connected 1. NH 4 : Chennai and Hyderabad 2. NH 6 : Mumbai and Kolkata 3. NH 15 : Ahmedabad and Jodhpur Which of the above pairs is/are correctly matched?

Table lists important NH numbers with their routes and explicitly shows routes for many NHs (and notes old NH numbers), illustrating that route-to-number mapping is how one checks which cities a given NH connects.

A student could use this pattern to look up NH4 in an equivalent table or map (or note if NH4 was renumbered) to see whether its route includes Chennai–Hyderabad.

Describes the Golden Quadrilateral segments connecting major metros including Chennai and shows which city-pairs are linked by major NH projects.

Knowing which major corridors connect Chennai helps a student rule in/out whether a given NH number (NH4) is likely the Chennai–Hyderabad link by comparing known corridors on a map.

Shows that NH numbering has changed (e.g., NH–44 noted as Old NH7) and gives examples of routes tied to current NH numbers.

A student should consider that 'NH4' might be an old or new designation and check renumbering lists or maps to locate the current route corresponding to NH4.

Defines that National Highways connect state capitals and major cities, implying Hyderabad and Chennai would be linked only if an NH route specifically ran between those capitals.

A student could use this rule plus a map of NH routes to see whether any single NH route directly links the two state capitals.

Notes that National Highways are shown in official maps/figures and maintained by agencies (NHAI, PWD, BRO), indicating authoritative sources exist for verifying any NH's route.

A student could consult an official NH map or NHAI route list (consistent with this practice) to confirm whether NH4 connects Chennai and Hyderabad.