The correct answer is (d) Varanasi.
National Highway 2 is a national highway in India that runs from Kanyakumari in the south to Srinagar in the north. It is the longest national highway in India, with a total length of 2,465 kilometers. The highway passes through the states of Tamil Nadu, Kerala, Karnataka, Andhra Pradesh, Telangana, Maharashtra, Gujarat, Rajasthan, Haryana, Punjab, Jammu and Kashmir, and Uttar Pradesh.
Agra, Allahabad, and Lucknow are all cities in Uttar Pradesh that are connected by National Highway 2. Varanasi, on the other hand, is not connected by National Highway 2. It is connected by National Highway 56, which runs from Varanasi to Kanpur.
National Highway 2 is a four-lane highway for most of its length. It is a major transportation artery in India, and it carries a large volume of traffic. The highway is well-maintained, and it is a safe and reliable way to travel.