Answer : 4. "सीकर "
Explanation :

1. Harsh Parvat is located in Sikar district of Rajasthan. This mountain is located about 14 kilometres south-east of Sikar city.

2. Harsh Parvat is named after Harshnath Temple. This temple is situated at the foothills of Harsha Parvat.

3. A beautiful view of the surrounding area is visible from this mountain. There are also many religious places, historical sites, and natural sites on Harsha Parvat.