Plantation agriculture is a type of commercial farming where a single crop is grown on a large scale, typically requiring large estates, capital investment, and modern processing.
Step 1: Identify characteristics of plantation crops.
Plantation crops are usually perennial crops grown for sale in distant markets. Examples include tea, coffee (Option A), sugarcane (Option B), rubber (Option D), and cashews. These crops often involve a processing unit on the estate itself.
Step 2: Analyze the nature of Wheat.
Wheat (Option C) is a cereal grain. While it can be grown commercially on large farms (extensive commercial grain cultivation), it is not classified as a plantation crop. It is an annual crop usually associated with intensive or extensive subsistence/commercial grain farming rather than the specialized estate-based system of plantations.
Step 3: Conclusion.
Since coffee, sugarcane, and rubber are all standard examples of plantation crops, wheat is the outlier.
Final Answer: Wheat