Molecules can be made of atoms Of

the same element only

different elements only

the same or different elements

Molecules can be made of the atoms of same element as well as of the different elements.

Explanation:

H2 is called a molecule because it is made up of atoms of same elements H.

Also, H2O is called a molecule as it is made up of atoms of different elements H and O.

The same or different elements

Explanation:

I did this question, thats correct.