पृथ्वी की कौन सी कठोर बाहरी परत संपूर्ण भूपर्पटी और ऊपरी मेंटल के सबसे ऊपरी ठोस भाग दोनों को समाहित करती है?

The Dandi March, also known as the Salt Satyagraha, was led by which influential leader?

Which act formally granted independence to India, marking the end of British rule?

Who was the key figure in establishing the Indian National Congress?