Explanation:

- After his release from prison in January 1931, Mahatma Gandhi engaged in discussions with Congress leaders about the next steps to take in the freedom struggle.

- The meeting to plan the future course of action was held in Allahabad.

- Calcutta (Option 1): This city was significant in Congress history but not the venue for the January 1931 meeting.

- Lahore (Option 2): Known for the 1929 session where the demand for complete independence was adopted, but not relevant here.

- Allahabad (Option 3): The correct location where Congress leaders met after Gandhi's release to strategize future actions.

- Surat (Option 4): Known for the 1907 Congress split, not related to this context.