गुरु गोविंद सिंह जी द्वारा लिखित ऐतिहासिक पत्र 'ज़फ़रनामा' किस भाषा में था?

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?