कौन सा प्राचीन भारतीय शहर अपनी सुनियोजित ग्रिड सड़कों और उन्नत जल निकासी प्रणाली के लिए जाना जाता है, जो हड़प्पा कालीन शहरी नियोजन की जटिलता को दर्शाता 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?