The correct answer is 2 and 3 only. Important Points The Indian Government has accep­ted the meridian of 82.5° east for the standard time which is 5 hours 30 mins, ahead of Greenwich Mean Time. The standard time meridian of India passes through Russia, Kazakhstan China Nepal. ​Mistake Points Indian standard time meridian does not pass through Sri Lanka and Bangladesh. Additional Information Standard time is referred to as the synchronization of clocks within a certain geographical area to a single standard time, instead of using solar time or a locally chosen meridian (longitude) to establish a local mean time standard. The Standard Meridian of India having the longitude 82°30’E, which passes through Mirzapur in Uttar Pradesh is considered as the standard time for the whole country. There is a general understanding among the countries of the world to select the standard meridian in multiples of 7°30' of longitude. That is why 82°30' E has been selected as the ‘standard meridian’ of India. Indian Standard Time is ahead of Greenwich Mean Time by 5 hours and 30 minutes. The Standard Meridian passes through five states in India – Uttar Pradesh, Madhya Pradesh, Chhattisgarh, Odisha, Andhra Pradesh. There are some countries where there is more than one standard meridian due to their vast east-to-west extent. For example, the USA has seven time zones.