महात्मा गांधी द्वारा औपचारिक रूप से 'भारत छोड़ो आंदोलन' किस वर्ष शुरू किया गया था?

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?