Question

Which of the following is necessary for photosynthesis?

• A. Carbon dioxide
• B. Methane
• C. Nitrogen
• D. Oxygen

Answer 1

The correct option is A

Carbon dioxide

An explanation for correct option (a)

(a) Carbon dioxide-

• It is used for photosynthesis in plants.

The explanation for incorrect options

(b) Nitrogen-

• It is not used for photosynthesis in plants.
• It is an important component of proteins for all living beings.

(c) Oxygen-

• It is not used for photosynthesis in plants.
• It supports combustion and so it is necessary for burning.

(d) Methane-

• It is not used for photosynthesis in plants.
• It is a greenhouse gas that helps to maintain the right temperature of the earth.

Option (a) is the correct option as Carbon dioxide is necessary for photosynthesis in plants.