Sultanpur National Park is situated in which district of Haryana?

The correct answer is: A. Yamunanagar.

Sultanpur National Park is a bird sanctuary and national park located in the Yamunanagar district of Haryana, India. It is spread over an area of 1,000 hectares (2,500 acres) and is home to a variety of birds, including flamingos, pelicans, and herons. The park is also a popular tourist destination.

The other options are incorrect because:

• Gurugram is a district in the Indian state of Haryana. It is located in the southern part of the state and is the most populous district in Haryana.
• Rewari is a district in the Indian state of Haryana. It is located in the southern part of the state and is known for its historical monuments.
• Sirsa is a district in the Indian state of Haryana. It is located in the northwestern part of the state and is known for its agricultural production.