The Congress annual session of December 1929 in Lahore was significant because of:

Correct option is A

The correct answer is (a) commitment to Purna Swaraj.
· The Lahore session of the Indian National Congress in December 1929 was a landmark event where the resolution for 'Purna Swaraj' or complete independence from British rule was adopted.
· It was during this session that Jawaharlal Nehru was elected as the President of the Congress.
· The Congress decided to celebrate 26th January 1930 as the first Independence Day, which later became the foundation for the Republic Day celebrated annually in India.
· This session marked a definitive shift from the earlier demand for dominion status to the complete independence of India.
Information Booster:
· Overwhelming majority : While the session had strong support, the significance lies more in the resolution for Purna Swaraj.
· Work done by the people of the country : Though important, this was not the primary significance of the session.
· Indians becoming self-reliant : Self-reliance was a broader goal of the freedom movement, but the Lahore session specifically focused on the demand for complete independence.