Question

the reactants of photosynthesis are
water and carbon dioxide.
organic compounds.
glucose and water.
glucose and carbon dioxide.
glucose and sunlight.

Explanation:

Photosynthesis is the process by which plants use sunlight, carbon dioxide ($\ce{CO_2}$), and water ($\ce{H_2O}$) to produce glucose (a type of organic compound) and oxygen. The reactants (substances used) in photosynthesis are water and carbon dioxide. Organic compounds, glucose, etc., are products or involved in other processes, not reactants of photosynthesis. Sunlight is an energy source, not a reactant in the same sense as the chemical substances.

Answer:

A. water and carbon dioxide.