The event that does not occur in photosynthesis is (c) Oxidation of carbon to carbon dioxide.
Explanation: Photosynthesis is the process where plants convert carbon dioxide into carbohydrates, not the other way around. Oxidation of carbon to carbon dioxide is a process that occurs during respiration, not photosynthesis.
Why other options are incorrect:
(a) Absorption of light energy by chlorophyll:
This is the first step of photosynthesis, where chlorophyll molecules in the plant leaves absorb light energy from the sun.
(b) Reduction of carbon dioxide to carbohydrates:
Photosynthesis primarily involves the reduction of carbon dioxide (CO2) into glucose and other carbohydrates.
(d) Conversion of light energy to chemical energy:
Photosynthesis converts light energy captured by chlorophyll into chemical energy that is stored in the bonds of glucose molecules.