Explanation:

- The Jhanda Satyagraha, or Flag Satyagraha, was an important event in the Indian freedom struggle.

- It focused on the right to hoist the national flag, protesting against the restrictions imposed by the British.

- Nagpur is the city where this protest took place in 1923. ?

- Bombay was a significant center for other freedom movements but not for the Flag Satyagraha.

- Calcutta was another major hub for independence activities, yet not linked to this specific event.

- Ahmedabad also contributed to the freedom movement, with events like the Salt March.