फिरोजशाह तुगलक ने किन प्रसिद्ध विद्वानों को अपना संरक्षण प्रदान 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?