Choose the correct option with respect to the Poona Pact.
1. Signed in August 1931 between Mahatma Gandhi and BR Ambedkar.
2. Signed in August 1931 between Mahatma Gandhi and Lord Irwin.
3. Signed in August 1932 between Mahatma Gandhi and Lord Irwin.
4. Signed in August 1932 between Mahatma Gandhi and BR Ambedkar.