The Indian National Congress session of September 1920 was held at _________

Calcutta

The correct answer is Option 3- Calcutta

The Indian National Congress session of September 1920 was held at Calcutta, India.

The session was presided over by Lala Lajpat Rai, and it was attended by over 15,000 delegates. The session was significant because it marked the beginning of the Non-Cooperation Movement, which was launched by Mahatma Gandhi in response to the British government's repressive policies.

At the Calcutta session, the Congress passed a resolution calling for the boycott of British goods, educational institutions, and courts. The resolution also called for the resignation of Indians from government jobs.

The Non-Cooperation Movement was a major turning point in the Indian independence movement. It was a mass movement that involved millions of people from all walks of life. The movement had a significant impact on the British government, and it helped to pave the way for India's independence in 1947.