बरीदशाही राजवंश ने किस वर्ष औपचारिक रूप से स्वतंत्रता की घोषणा कर अपनी स्थापना पूरी की थी?

The 'Drain of Wealth' theory was propounded by which Indian nationalist leader?

Which event is considered the turning point in Mahatma Gandhi's leadership in the Indian independence movement?

Which African leader is known for his non-violent opposition to colonial rule?