निम्नलिखित में से किस महासागर की धाराएं उत्तर-पूर्वी और दक्षिण-पश्चिमी मानसूनी हवाओं के कारण वर्ष में दो बार अपने प्रवाह की दिशा बदल देती 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?