Final answer:
India's Independence Day is on August 15, with the British leaving in 1947, which is represented by option B) August 15, 1947. This day marks the end of British colonial rule and the beginning of India as an independent nation.
Step-by-step explanation:
India's Independence Day is celebrated on August 15, and it was on August 15, 1947, that the British officially left, marking the end of colonial rule. This was a significant moment in world history, as it also led to the creation of the separate nation of Pakistan. The lead-up to this event was characterized by widespread religious violence and political unrest, with a stark division between Hindus and Muslims over the future of India. The resulting partition displaced millions of people and caused tremendous upheaval. Gandhi's 'Quit India' movement and passive resistance played a crucial role in the eventual independence of the country.