Correct Answer: (a) 52
Solution:The revised number of the National Highways connecting Indore to Jaipur is 52. National Highway 52 (NH52) is a 2,317 km long highway which connects north to south India. NH52 passes via the major cities of Hisar, Tonk, Kota, Fatehpur, Jaipur, Dewas, Indore, Sendhwa, Beed, Salabur, Aurangabad, Dhule, Hubli and Bijapur.