Concept:The Standard Meridian is a fixed longitude used to set the uniform official time for the entire country.
Explanation:India's Standard Meridian is 82°30' E longitude. This is the same as 82.5° E because 30 minutes equals half a degree.
This meridian passes through Mirzapur in Uttar Pradesh. Indian Standard Time (IST) is determined along this longitude.
India's mainland extends from 68°7' E to 97°25' E in longitude.
Out of the given options, only 82°30' E correctly identifies India's Standard Meridian.
Options B (82°50' E), C (82° E), and D (83°30' E) are not the Standard Meridian of India.
Using a single Standard Meridian ensures that all regions in India follow the same time, avoiding confusion.
Answer:Option A: 82°30' E longitude
