Indian Standard Time (IST) is ahead of Greenwich Mean Time

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Indian Standard Time (IST) is ahead of Greenwich Mean Time (GMT) by how many hours ?

1. 4 : 30 hours
2. 5 : 00 hours
3. 5 : 30 hours
4. 6 : 00 hours

Correct Option: C

Indian Standard Time (IST) is 5 : 30 hours (5 hours 30 minutes) ahead of Greenwich Mean Time (GMT). IST is calculated on the basis of 82.5° E lonitude, in Shankargarh Fort (25.15°N 82.58°E) in Allahabad district in the state of Uttar Pradesh.