Explanation:

- Option 1: PV Sindhu

- PV Sindhu became India's first badminton world champion in 2019. She won the BWF World Championships, making history for India.

- Option 2: Kidambi Srikanth

- While Kidambi Srikanth is an accomplished Indian badminton player, he did not win the world championship in 2019.

- Option 3: Jwala Gutta

- Jwala Gutta is known for her achievements in doubles badminton but has not been a world singles champion.

- Option 4: Saina Nehwal

- Saina Nehwal is another prominent Indian badminton player who has achieved great success, including an Olympic medal, but she did not win the world championship in 2019.