बिना रूकावट वैश्विक प्रसारण हेतु कम-से-कम कितने तुल्यकाली उपग्रह जरूरी होंगे?

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?