Spices not grown in Kerala:
The correct answer is option 'D' - Capsicum.

Explanation:
Kerala, located on the southwestern coast of India, is known as the "Spice Garden of India" due to its rich spice cultivation. The state's diverse climate and geographical features make it an ideal region for growing a wide variety of spices. However, there are certain spices that are not commonly grown in Kerala, and one of them is Capsicum.

Reasons why Capsicum is not grown in Kerala:
1. Climate: Capsicum requires a warm and dry climate to thrive, with temperatures ranging between 20 to 25 degrees Celsius. Kerala, on the other hand, has a tropical climate characterized by high humidity and heavy rainfall throughout the year, which is not conducive for the growth of Capsicum plants.

2. Soil Requirements: Capsicum plants prefer well-drained soil that is rich in organic matter. Kerala, with its high rainfall and waterlogged conditions, often has clayey and loamy soil, which may not be suitable for the cultivation of Capsicum.

Spices grown in Kerala:
1. Pepper: Kerala is famous for its black pepper cultivation. The state accounts for a significant portion of India's total pepper production. The humid climate and hilly terrain of Kerala provide favorable conditions for the growth of pepper vines.

2. Cloves: Clove trees, which produce the aromatic spice known as cloves, are also grown in Kerala. Clove cultivation requires a warm and humid climate, making Kerala an ideal location for its growth.

3. Cardamoms: Kerala is one of the largest producers of cardamom in India. The cool and misty hills of the Western Ghats in Kerala provide the perfect conditions for the cultivation of this spice.

Conclusion:
While Kerala is known for its vast array of spices, including pepper, cloves, and cardamoms, Capsicum is not traditionally grown in the state. The unsuitable climate and soil conditions make it challenging to cultivate Capsicum plants successfully.