Concept:The Swaraj Party was formed in 1923 by leaders who wanted more self-government within the British system.Explanation:It was established on 1 January 1923 by Chittaranjan Das and Motilal Nehru.C. R. Das became its first President, and Motilal Nehru served as its Secretary.The party aimed to seek greater self-rule and political freedom for Indians from British rule.It was also known as the Congress Khilafat Swaraj Party.Answer:C. R. Das and Motilal Nehru (Option C)