Anton thinks that glucose is a reactant of photosynthesis, but his classmate Jamila disagrees.

Who is correct, and why?

1. Anton is correct because glucose is a substance that is present before the chemical reaction of photosynthesis takes place.

2. Anton is correct because glucose is a substance that is formed from the chemical reaction of photosynthesis.

3. Jamila is correct because glucose is a product, not a reactant, of photosynthesis.

4. Jamila is correct because glucose is not involved in the chemical reaction of photosynthesis.