Question

Which of the following is a ${C_4}$ plant?
A. Sugarcane
B. Tomato
C. Mango
D. Apple

Answer 1

${C_4}$ plants are those plants in which the carbon dioxide gets fixed forming oxaloacetic acid as the first stable product. Oxaloacetic acid is a 4-carbon containing compound and hence the name. These plants show a special anatomy known as Kranz Anatomy.

Complete answer:
To solve the question, we must first know about the ${C_4}$ plants. ${C_4}$ plants follow a special type of pathway for their carbon dioxide fixation. This ${C_4}$ pathway was first observed in grasses like sugarcane, maize and other such members of the Family Gramineae. The ${C_4}$ plants are photosynthetically more efficient as compared to the ${C_3}$ plants.
The ${C_4}$ plants have Kranz Anatomy. The features of plants exhibiting Kranz Anatomy are:

The Bundle sheaths surround the vascular bundles. The chloroplasts of the bundle sheaths are large in size and contain grains of starch.
The chloroplasts of the mesophyll cells are small in size.
The ${C_4}$ plants are able to grow in areas where there is very little supply of carbon dioxide.

The sugarcane plant shows Kranz Anatomy and so it is a ${C_4}$ plant. Hence, the correct answer to this question is ${C_4}$ plants.

Note: It must be noted here that in the ${C_3}$ cycle the carbon dioxide acceptor is Ribulose-1, 5- bisphosphate whereas in the ${C_4}$ cycle the carbon dioxide acceptor is Phosphoenol-pyruvate. Further, due to Kranz Anatomy the ${C_4}$ plants do not show photorespiration which is very much evident in the ${C_3}$ plants.