The correct answer is A) Idukki.
Munnar is a town in the Idukki district of Kerala, India. It is a popular tourist destination known for its tea plantations, mountains, and wildlife sanctuaries. The town is located in the Western Ghats mountain range and is surrounded by hills and forests. Munnar is a popular destination for trekking, hiking, and camping. The town is also home to a number of waterfalls, including the Athirappilly Falls, the largest waterfall in Kerala.
The other options are incorrect. Wayanad is a district in the northern part of Kerala. Kannur is a district in the northern part of Kerala. Palakkad is a district in the central part of Kerala.