The correct option is C 1920 Nagpur Conference
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The Nagpur Conference of the Indian National Congress gave its approval for the Non-cooperation movement in December 1920. The Congress made a strong demand for India’s independence instead of self-government under British rule. Mahatma Gandhi surrendered his ‘Kaiser-e-hind’ award. Rabindranath Tagore gave up his Knighthood. Many prominent lawyers, such as Motilal Nehru, C R Das, C Rajagopalachari, and Asaf Ali, gave up their practices.