निम्नलिखित में से कौन-सा भारत का प्रथम प्रायोगिक पृथ्वी प्रेषण (भूप्रक्षेपण) उपग्रह 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?