The Standard Meridian of India is
A. 81°30’ East
B. 82°30’ East
C. 83°30’ East
D. 84°30’ East

Hint: The Standard Meridian of India passes through Mirzapur in the state of Uttar Pradesh. The latitudinal extent influences the duration of day and night for the whole country as we move from south to north.

Complete answer:
The time meridian determines each standard time zone roughly upon a line of longitude exactly divisible by 15 degrees.The prime meridian is the starting point for the standard time zones. It is an arbitrary longitude line.
A standard meridian is established in all the countries so that it is the central longitude of the whole country and there is an equal time in the whole country.
The local times of places differ from one place to another. In India, there is a difference of about 1 hour and 45 minutes in the local times of Dwarka in Gujarat and Dibrugarh in Assam. Therefore, it is necessary to adopt the local time of some central meridian of a country as the standard time for the whole country. The longitude of 82° 30’E is considered as the standard meridian of India. The time at the standard meridian is considered as the time for the whole country and is called the Indian Standard Time or IST.
Indian standard time is five and a half hours ahead of the Greenwich Mean time( GMT). Greenwich is a place in the United Kingdom through which the Prime meridian passes.

The correct answer is option B)82°30’ East.

Note: The standard meridian of India passes through five states, namely :-
Uttar Pradesh
Madhya Pradesh
Chattisgarh
Orissa
Andhra Pradesh