निम्नलिखित प्रमुख नेताओं में से किसने भारत में 'दलविहीन लोकतंत्र' का पुरजोर समर्थन किया 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?