Explanation:

- Karnam Malleswari (Option 4) is the correct answer. She became the first Indian woman to win an Olympic medal when she secured a bronze in weightlifting at the 2000 Sydney Olympics.

- Mirabai Chanu (Option 1) is a renowned Indian weightlifter who won a silver medal at the 2020 Tokyo Olympics, but she is not the first Indian woman to win an Olympic medal.

- PV Sindhu (Option 2) is a celebrated Indian badminton player who won a silver medal at the 2016 Rio Olympics and a bronze at the 2020 Tokyo Olympics.

- Saina Nehwal (Option 3) is another prominent badminton player who won a bronze medal at the 2012 London Olympics.