NEET BIOLOGY

Detailed explanation-1: -> Oxygen is released during the process of photosynthesis. So, the correct answer is option b) Oxygen.

Detailed explanation-2: -Carbon dioxide, CO2, is a colorless gas. It is made of two oxygen atoms covalently bonded to one carbon atom. It is exhaled by animals and utilized by plants during photosynthesis. Carbon dioxide: It is a colorless and odorless molecule.

Detailed explanation-3: -Photosynthesis is the process by which green plants synthesise their own food from carbon dioxide and water in the presence of sunlight and chlorophyll. During this process, oxygen is released as a by-product.

Detailed explanation-4: -Thus, water (H2O) is the source of oxygen released during photosynthesis.

Detailed explanation-5: -When green plants perform photosynthesis, they take in carbon dioxide and release oxygen into the air.