Explanation:

- Option 1: Guwahati

- The Khelo India Youth Games 2020 were indeed hosted in Guwahati, Assam.

- This was the third edition of the games and took place from January 10 to January 22, 2020.

- Guwahati was selected to promote sports culture in the North-Eastern region of India.

- ?? Correct Answer: Guwahati

- Option 2: Chandigarh

- Not the host for the 2020 edition of Khelo India Youth Games.

- Known for hosting other events but not this specific edition.

- Option 3: Bhopal

- Also not the host city for the Khelo India Youth Games 2020.

- Often hosts various national sports events but not this one in 2020.

- Option 4: New Delhi

- New Delhi is a major sporting hub but did not host the 2020 event.