The Sun is losing mass and hydrogen. The Sun is losing volume and hydrogen. The Sun is losing mass and helium. The Sun is losing volume and helium.
I gave my students this multiple choice question: The Sun transforms matter into energy through nuclear fusion. What can be inferred about the Sun from this fact?

Only one answer is correct among these 4 choices:
- The Sun is losing mass and hydrogen.
- The Sun is losing volume and hydrogen.
- The Sun is losing mass and helium.
- The Sun is losing volume and helium.

Could you tell me which one is correct?

The Sun is losing mass and hydrogen.