निम्नलिखित संख्या श्रृंखला में प्रश्न चिह्न (?) के स्थान पर कौन सी संख्या आएगी? 256, 123, 66, ?, 18, 6

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?