Mahatma Gandhi's concept of Civil Disobedience was primarily influenced by which philosopher's writings?

Who founded the Congress-Khilafat Swaraj Party in December 1922 (functioning from 1923)?

Which son of Maharaja Ranjit Singh was taken by the British to England?

Who among the following was primarily known as the 'Grand Old Man of India' focusing on economic and political issues, rather than a social reformist leader fighting social evils in the early 19th century?