निम्नलिखित में से कौन सी संख्या दी गई श्रृंखला में प्रश्न चिह्न (?) को प्रतिस्थापित करेगी? 7, 9, 13, 21, 37, ?

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?