- **Option 1: Jyotiba Phule**
- Jyotiba Phule was a social reformer and writer, best known for his efforts in women's education and the eradication of caste discrimination in colonial India. He didn't author "Why I am an Atheist."

- **Option 2: Raja Ram Mohan Roy**
- Raja Ram Mohan Roy was a prominent social and religious reformer who played a key role in abolishing the practice of sati and modernizing Indian society. He is not associated with "Why I am an Atheist."

- **Option 3: Bhagat Singh**
- ✅ Bhagat Singh, the Indian freedom fighter, wrote "Why I am an Atheist." It is an essay where he explains his atheist beliefs and the reasoning behind them.

- **Option 4: BR Ambedkar**
- BR Ambedkar was a social reformer and the principal architect of the Indian Constitution. While he wrote extensively on social and political issues, he is not the author of "Why I am an Atheist."

YOUR ANSWER IS RIGHT