The correct answer is: c) Barail Range.
The Barail Range is a mountain range in the Indian state of Assam. It is located in the south-eastern part of the state, and forms the southern border of the Brahmaputra Valley. The range is part of the Eastern Ghats, and is a continuation of the Shillong Plateau. The Barail Range is a low-lying range, with an average elevation of about 1,000 metres (3,300 ft). The highest peak in the range is Mount Nongkhnum, which has an elevation of 1,417 metres (4,649 ft).
The Barail Range is a forested range, and is home to a variety of wildlife, including tigers, leopards, elephants, and deer. The range is also home to a number of ethnic groups, including the Karbi, Dimasa, and Garo.
The Barail Range is an important watershed, and the rivers that flow from the range provide water for irrigation and drinking water to the people of Assam. The range is also an important source of timber and other forest products.
The Barail Range is a beautiful and scenic range, and is a popular tourist destination. The range is home to a number of waterfalls, including the Nohkalikai Falls, which is the highest waterfall in India. The range is also home to a number of caves, including the Krem Liat Prah cave, which is the largest cave in India.
The Barail Range is an important part of the natural heritage of Assam, and is a valuable resource for the people of the state.