Q. Which of the following State Highways in Uttar Pradesh has the longest route? Answer:
SH-21
Notes: SH-21 is the longest State Highway in the list, spanning 385 km across Uttar Pradesh, connecting Lakhimpur-Kheri, Hardoi, Kannauj, Auraiya, Sitapur, Jalaun, Hamirpur, and Mahoba.