स्वतंत्रता-पूर्व के किस वर्ष में भारत की पूरी आबादी के लिए अंतिम बार व्यापक रूप से प्रकाशित जाति-आधारित जनगणना आयोजित की गई थी?

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?