भारत में हुई प्रथम बड़ा विद्रोह, जिसे सिपाही विद्रोह के रूप में भी जाना जाता है, किस वर्ष हुआ था?

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?