Which of the following represents a compound?

A) H

B) H-3

C) H2O

D) O-16

The answer is C. H2

To be considered as a compound, it need to contain two on more elements.

From the option above, only H2O contains 2 elements, H is for Hydrogen and O is for oxygen. This compound formed a substance that we most commonly know as water.

C, H2O represents the compound responsible for constituting water.