The correct answer is b) Wayanad Wildlife Sanctuary.
Wayanad Wildlife Sanctuary is a significant tiger reserve in Kerala. It is located in the Wayanad district of Kerala, India. The sanctuary is spread over an area of 3,980 square kilometers (1,540 sq mi). It is one of the most important tiger reserves in India. The sanctuary is home to a variety of wildlife, including tigers, leopards, elephants, gaur, and deer. The sanctuary is also home to a variety of birds, including hornbills, peacocks, and kingfishers.
The other options are incorrect because they are not significant tiger reserves.
a) Chinnar Wildlife Sanctuary is a protected area in Kerala, India. It is located in the Idukki district of Kerala. The sanctuary is spread over an area of 875 square kilometers (337 sq mi). It is home to a variety of wildlife, including tigers, leopards, elephants, gaur, and deer. The sanctuary is also home to a variety of birds, including hornbills, peacocks, and kingfishers. However, it is not a significant tiger reserve.
c) Idukki Wildlife Sanctuary is a protected area in Kerala, India. It is located in the Idukki district of Kerala. The sanctuary is spread over an area of 777 square kilometers (300 sq mi). It is home to a variety of wildlife, including tigers, leopards, elephants, gaur, and deer. The sanctuary is also home to a variety of birds, including hornbills, peacocks, and kingfishers. However, it is not a significant tiger reserve.
d) Aralam Wildlife Sanctuary is a protected area in Kerala, India. It is located in the Kannur district of Kerala. The sanctuary is spread over an area of 180 square kilometers (69 sq mi). It is home to a variety of wildlife, including tigers, leopards, elephants, gaur, and deer. The sanctuary is also home to a variety of birds, including hornbills, peacocks, and kingfishers. However, it is not a significant tiger reserve.