HORTICULTURE

Detailed explanation-1: -Carbon dioxide is not released during photosynthesis, but small amounts of that gas are emitted both day and night as a by-product of cellular respiration.

Detailed explanation-2: -Plants use photosynthesis to capture carbon dioxide and then release half of it into the atmosphere through respiration.

Detailed explanation-3: -From the above information we have found that carbon dioxide is not released during photosynthesis. Instead of it oxygen is released. Hence, the correct answer is option (B).

Detailed explanation-4: -During the daytime, plants neither take in oxygen nor release carbon dioxide. This is because oxygen which is produced during photosynthesis is used for burning food. Carbon dioxide produced during respiration is used in photosynthesis. But at night, plants also take in oxygen and give out carbon dioxide like animals.