Explanation:

• After the Chauri Chaura incident, Mahatma Gandhi withdrew the non-cooperation movement in 1922.
• This was met with a lot of disagreements among leaders of the Congress Party.
• While some wanted to continue non-cooperation, others wanted to end the legislature boycott and contest elections. The former were called no-changers and such leaders included Rajendra Prasad, Sardar Vallabhai Patel, C Rajagopalachari, etc.
• The others who wanted to enter the legislative council and obstruct the British government from within were called the pro-changers. These leaders included C R Das, Motilal Nehru, Srinivasa Iyengar, etc.      
• In 1922, in the Gaya session of the Congress, C R Das (who was presiding over the session) moved a proposal to enter the legislatures but it was defeated. Das and other leaders broke away from the Congress and formed the Swaraj Party.
• C R Das was the President and the Secretary was Motilal Nehru.