पंजीकरण अधिनियम, 1908 की धारा 47 के तहत, एक पंजीकृत दस्तावेज किस तारीख से प्रभावी (operates) 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?