Explanation:

C. R. Das and Motilal Nehru formed the Swaraj Party within the Congress to argue for a return to  council politics. But younger leaders like Jawaharlal Nehru and Subhas Chandra Bose pressed for  more radical mass agitation and for full independence. In December 1929, under the presidency of  Jawaharlal Nehru, the Lahore Congress formalised the demand of ‘Purna Swaraj’ or full  independence for India. It was declared that 26 January 1930, would be celebrated as the  Independence Day when people were to take a pledge to struggle for complete independence.