कौन सी प्रमुख नदी प्रणाली सिंधु घाटी सभ्यता के प्रमुख स्थलों हड़प्पा और मोहनजोदड़ो को भौगोलिक रूप से जोड़ती थी?

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?