Answer : The correct option is, (a) oxygen
Explanation :
Photosynthesis : It is a type of process that occurs in the green plant. In the photosynthesis process, the green plants use the energy of light to convert the carbon dioxide and water into glucose as a product and oxygen as a byproduct.
The balanced chemical reaction will be,
[tex]6CO_2+6H_2O\overset{sunlight}\rightarrow C_6H_{12}O_6+O_2[/tex]
In the photosynthesis process, carbon dioxide and water are the input and the glucose and oxygen are the output.
Hence, an output of the photosynthesis is, oxygen
