The correct answer is A. Color blindness.
This causes the eye not only to be unable to see the Red color, but also the Green color, which leads to color blindness in people.
Photosynthesis produces both glucose (sugar) and oxygen as products in the chemical reaction. Plants use photosynthesis to take in sunlight, water, and carbon dioxide as reactants and produce glucose for energy and oxygen. The reactants for photosynthesis are light energy, water, carbon dioxide and chlorophyll , while the products are glucose (sugar), oxygen and water.
I hope this helps =)