Carbon dioxide and water are turned into sugar and oxygen. Sugar and oxygen are turned into water and carbon dioxide. Oxygen and carbon dioxide are turned into water and sugar. Water and sugar are turned into oxygen and carbon dioxide.
I gave my students this multiple choice question: Which of the following statements best describes photosynthesis?

Only one answer is correct among these 4 choices:
- Carbon dioxide and water are turned into sugar and oxygen.
- Sugar and oxygen are turned into water and carbon dioxide.
- Oxygen and carbon dioxide are turned into water and sugar.
- Water and sugar are turned into oxygen and carbon dioxide.

Could you tell me which one is correct?

Carbon dioxide and water are turned into sugar and oxygen.