Longest National Highway of India is :

Correct option is D

The correct answer is (d) NH-7.

NH-7, now renumbered as NH-44 under the new National Highway renumbering system, is the longest National Highway in India. It spans from Srinagar in Jammu & Kashmir to Kanyakumari in Tamil Nadu, covering a total distance of approximately 4,112 kilometers.

Key Features of NH-44 (formerly NH-7):

1. Route:

• Starts in Srinagar, Jammu & Kashmir.

• Passes through states like Himachal Pradesh, Punjab, Haryana, Delhi, Uttar Pradesh, Madhya Pradesh, Maharashtra, Telangana, Andhra Pradesh, Karnataka, and Tamil Nadu.

• Ends at Kanyakumari, Tamil Nadu.

2. Importance:

• Connects India's northernmost point to its southernmost tip.

• Plays a vital role in interstate trade, transport, and connectivity.

3. Significance:

• Enhances economic activity along its route.

• Serves as a critical link for military and emergency purposes.

Other Options:

• NH-2: Renamed as NH-19, connecting Delhi to Kolkata.

• NH-4: Renamed and shortened; it earlier connected Mumbai to Chennai.

NH-6: Renamed as NH-53, connecting Surat in Gujarat to Kolkata in West Bengal.