Mudumalai Sanctuary is situated in:

Kerala
Tamil Nadu
Andhra Pradesh
U.P.

The correct answer is B. Tamil Nadu.

Mudumalai Sanctuary is a tiger reserve and wildlife sanctuary in the Nilgiri Hills of the Western Ghats in the Indian state of Tamil Nadu. It is located in the districts of Nilgiris, Coimbatore, and Dindigul. The sanctuary is contiguous with Bandipur National Park in Karnataka and Nagarhole National Park in Karnataka and Kerala. It is part of the Nilgiri Biosphere Reserve, a UNESCO World Heritage Site.

The sanctuary was established in 1955 and covers an area of 321 square kilometers (124 square miles). It is home to a variety of wildlife, including tigers, leopards, elephants, gaur, sambar, chital, and wild boar. The sanctuary is also home to a variety of birds, including hornbills, peacocks, and kingfishers.

The sanctuary is a popular tourist destination and offers a variety of activities, including trekking, camping, and bird watching.

Option A is incorrect because Kerala is a state in southern India.

Option C is incorrect because Andhra Pradesh is a state in southern India.

Option D is incorrect because Uttar Pradesh is a state in northern India.