Which of the following is part of the light reaction of photosynthesis? a) productin of carbohydrates. b) splitting up of water molecules. c) release of carbon dioxide.

The Option B is correct.

The part of light reaction of photosynthesis is splitting up of water molecules.

Because, in the first step of light dependent reaction, Water and carbon dioxide enter into the leaf.

After that light hit the pigment in the membrane of thylakoid splitting H2O into O2 i.e water into Oxygen.

Hope so, this answer will help you..

your spelling is a little off : ]