The correct answer is b) Thrissur.
Thrissur is a district in Kerala, India. It is known for its banana cultivation. The district is home to several banana plantations, which produce a variety of bananas, including the Ney Poovan, the Elakkiyan, and the Rasthali. The bananas grown in Thrissur are known for their taste and quality. They are exported to other parts of India and the world.
The other options are incorrect. Idukki is a district in Kerala that is known for its tea plantations. Kozhikode is a district in Kerala that is known for its spices. Palakkad is a district in Kerala that is known for its rice cultivation.
Banana cultivation is an important agricultural activity in Thrissur. It provides employment to a large number of people in the district. The banana plantations in Thrissur are a major source of income for the farmers in the district.