निम्नलिखित में से कौन सी एक प्रमुख बहुउद्देशीय जलविद्युत (हाइड्रोपावर) परियोजना है जो पंजाब को बिजली की आपूर्ति करती 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?