निम्नलिखित में से किसने कहा था कि 'प्रस्थिति एक संस्थागत भूमिका है'?

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?