कौन सा नेतृत्व सिद्धांत इस धारणा पर आधारित है कि 'नेता पैदा होते हैं, बनाए नहीं जाते'?

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?