कौन सी नदी प्रयागराज (पूर्व नाम इलाहाबाद) शहर से होकर बहती है, पवित्र मानी जाती है और जहाँ दो नदियों का संगम होता 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?