The correct answer is 5 States. Explanation & Key Takeaways: • The Standard Meridian of India passes through 5 States. • The standard meridian of India is 82°30'E. • The time of this meridian is taken as the standard time for the whole country. • The standard meridian of India passes through the following states: • Uttar Pradesh. • Madhya Pradesh. • Chhattisgarh. • Odisha. • Andhra Pradesh. Related Concepts: Standard meridian: • The Standard Meridian of India having a longitude of 82°30'E passes through Mirzapur in Uttar Pradesh and is considered the standard time for the whole country. • 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. • A standard meridian is established in every country so that it is the central longitude of the whole country and there is an equal time in all the countries.