किस भूवैज्ञानिक काल से भारत का प्रायद्वीपीय खंड मुख्य रूप से स्थिर और दृढ़ रहा 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?