The correct answer is A) Marayur.
Marayur is a village in the Idukki district of Kerala, India. It is famous for its cave paintings dating back to the Mesolithic era. The paintings depict hunting scenes, animals, and human figures. They are considered to be some of the oldest cave paintings in India.
The other options are incorrect. Wayanad is a district in Kerala, India. Kannur is a district in Kerala, India. Idukki is a district in Kerala, India. None of these districts are famous for their cave paintings.
The cave paintings at Marayur are a valuable archaeological site. They provide insights into the lives of the people who lived in the area during the Mesolithic era. The paintings are also a popular tourist attraction.