The Similipal National Park, a major tiger reserve, is located in which district?

The correct answer is: b) Mayurbhanj.

Similipal National Park is a national park in Mayurbhanj district of Odisha, India. It is the largest national park in Odisha and the third largest in India. The park is known for its rich biodiversity, including tigers, elephants, leopards, and a variety of birds. It is also a popular tourist destination.

The other options are incorrect because:

• Koraput is a district in Odisha, but Similipal National Park is not located in Koraput district.
• Keonjhar is a district in Odisha, but Similipal National Park is not located in Keonjhar district.
• Sambalpur is a district in Odisha, but Similipal National Park is not located in Sambalpur district.