निम्नलिखित में से किस नवपाषाण/ताम्रपाषाण स्थल से भारतीय उपमहाद्वीप में कपाल वेधन (ट्रेपेनेशन/शल्यचिकित्सा) के सबसे प्राचीन पुरातात्विक प्रमाण मिले 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?