Correct Answer: (d) None
Solution:When this question was asked, NH 4 links Mumbai to Chennai. NH 4 passes through Thane, Pune, Kolhapur, Bangalore, Chittoor, etc. Hyderabad does not lie on its way. Hence, pair 1 is not correct.RA NH6 begins from Hazira (Gujarat) and ends at Kolkata. The NH6 passes through the cities of Surat, Dhule, Jalgaon, Bhusaval, Akola, Amravati, Nagpur, Bhandara, Durg, Raipur, Mahasamund, Sambalpur, Kolkata. Mumbai does not lie on its way. Hence, pair 2 is also not correct. NH 15 connects Samakhiali in Gujarat with Pathankot in Punjab and passes through Pathankot, Amritsar, Kotkapura, Bhatinda, Ganganagar, Bikaner, Jaisalmer and Barmer. Ahmedabad and Jodhpur both are not on its way. Hence option (d) is correct.