oxygen, water, iron water, iron, oxygen oxygen, iron, water iron, oxygen, water
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which list gives the correct order of substances from the lowest melting point to the highest?
Possibilities:
- oxygen, water, iron
- water, iron, oxygen
- oxygen, iron, water
- iron, oxygen, water

oxygen, water, iron