The correct answer is c) Idukki.
Idukki is a district in the state of Kerala, India. It is located in the central part of the state and is bordered by the districts of Kottayam, Ernakulam, Thrissur, Palakkad, and Wayanad. The district has a population of over 2.5 million people and is the second most populous district in Kerala.
The district is known for its natural beauty and its many tourist attractions. The Idukki Dam, the largest dam in Kerala, is located in the district. The district is also home to the Eravikulam National Park, the Periyar Tiger Reserve, and the Chimmony Wildlife Sanctuary.
The district is also known for its spices. The “Spice Garden of Kerala” is located in Idukki. The garden is a popular tourist destination and is home to a variety of spices, including pepper, cardamom, cloves, and nutmeg.
The other options are incorrect because they are not districts in Kerala. Kannur is a district in the northern part of Kerala, Kozhikode is a district in the north-central part of Kerala, and Wayanad is a district in the northern part of Kerala.