लगभग 440 मिलियन वर्ष पहले घटित कौन सी विशिष्ट भूवैज्ञानिक घटना पृथ्वी के पहले प्रमुख सामूहिक विलोपन (mass extinction) के रूप में जानी जाती है, जिसके परिणामस्वरूप 85% प्रजातियां विलुप्त हो गई थीं?

Which Indian independence movement leader was primarily known for his philosophy and practice of non-violent civil disobedience?

Who gave the call for 'Do or Die' during the Quit India Movement in 1942?

Which of the following revolutionary pairs were imprisoned together in Cellular Jail and faced harsh conditions, contributing significantly to the Indian independence movement?