sodium [Na] lithium [Li] sulfur [S] carbon [C]
I gave my students this multiple choice question: Which of the following elements is best able to combine with itself and hydrogen [H] to form large molecules?

Only one answer is correct among these 4 choices:
- sodium [Na]
- lithium [Li]
- sulfur [S]
- carbon [C]

Could you tell me which one is correct?

carbon [C]