Which of the following is a C4 plant?
A) Sugarcane
B) Tomato
C) Mango
D) Apple

A C4 plant refers to a plant that uses a particular photosynthetic pathway called the C4 pathway, which is more efficient in hot, dry conditions compared to the C3 pathway. In C4 plants, carbon dioxide is initially fixed into a four-carbon compound before entering the Calvin cycle, which helps minimize photorespiration and optimize water use efficiency.

Let's analyze the options:

A. Sugarcane - Sugarcane is a well-known C4 plant. It thrives in hot climates and uses the C4 pathway to efficiently capture carbon dioxide.

B. Tomato - Tomato is a C3 plant. It uses the C3 pathway for photosynthesis, which is more common in temperate climates.

C. Mango - Mango is also a C3 plant, not a C4 plant.

D. Apple - Apple is another C3 plant, which uses the C3 photosynthetic pathway.

Therefore, the correct answer is A. Sugarcane.