Why is there a time lag of two hours from Gujarat to Arunachal Pradesh?
Because of India’s East-West extent
The correct answer is an option (d) – Because of India’s East-West extent.
Arunachal Pradesh lies at the Easternmost point of India and Gujarat lies at the Westernmost point of India. When can compared to Arunachal Pradesh and East-West the Sun rises two hours earlier in Arunachal Pradesh. The rate of the time at which the sun traverses over certain degrees of longitudes is used to determine the local time of an area concerning the time at the Prime Meridian (0°Longitude).
The local time at this meridian is taken as the standard time for the whole country. It is known as Indian Standard Time (IST). The meridian 82 degrees 30 minutes East passing through Mirzapur (in Uttar Pradesh) has been taken as the standard to set a uniform time for India.