Explanation:

- The Bangladesh Liberation War was a conflict that led to the independence of Bangladesh from Pakistan.

- Option 1: 14Th November 1972 - Incorrect. This date is after the end of the war; the conflict did not last until 1972.

- Option 2: 15Th December 1971 - Incorrect. This is close, but not the correct date. December 16, 1971, is the date when Bangladesh gained its independence.

- Option 3: 17Th October 1971 - Incorrect. The war was still ongoing during this period.

- Option 4: 2nd October 1974 - Incorrect. This date is well after the war had ended.

- Answer: The correct date is December 16, 1971.