Indian Standard Time is calculated along a line of longitude passing through:
- Apassing through Allahabad
- Bpassing through Delhi
- Cpassing through Kolkata
- Dpassing through Nasik
Solution & Step-by-step Explanation
Indian Standard Time (IST) is determined based on the Standard Meridian of India, which is fixed at the ** longitude. This line passes through Shankargarh Fort in Prayagraj (formerly Allahabad**) / Mirzapur in Uttar Pradesh.