ब्रिटिश भारत में दास प्रथा को किस वर्ष पूरी तरह प्रतिबंधित और अवैध घोषित किया गया था?

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?