पल्स पोलियो वायरस मुख्य रूप से बच्चे के शरीर के किस तंत्र पर हमला करता है और उसे गंभीर रूप से प्रभावित करता 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?