Question

During photosynthesis, plants take in ___ gas and release ___ gas.

• A. carbon dioxide, oxygen
• B. oxygen, carbon dioxide
• C. water vapour, methane
• D. oxygen, methane

Answer 1

The correct option is A

carbon dioxide, oxygen

The process by which the plant leaves absorb carbon dioxide to produce glucose (sugar) and oxygen is called photosynthesis.
Carbon dioxide + Water $\to$ Sugar + Oxygen.
It can be observed here that plants take in carbon dioxide gas and release oxygen gas during photosynthesis.