Explanation:

- Nagpur is often termed as the 'zero-mile centre' of India. The British identified it as the geographical heart of India and marked it as the zero-mile marker. This spot signifies the theoretical center of India.

- Jabalpur is a historical city situated in the state of Madhya Pradesh. Known for its natural and cultural significance, it is not recognized as the zero-mile center.

- Allahabad, now officially known as Prayagraj, is celebrated for its religious and historical importance, notably the Kumbh Mela festival. It isn’t associated with the zero-mile concept.

- Delhi, the capital city of India, is a major political and cultural hub but not connected with the zero-mile designation.

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