निम्नलिखित में से कौन से बालुका स्तूप (रेत के टीले) प्रचलित हवा की दिशा के समानांतर विकसित होते हैं?

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?