ऐतिहासिक और आर्थिक रूप से किस नदी को पश्चिम बंगाल की जीवनरेखा माना जाता 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?