Answer:
D. Hydrogen has a valence of 1 and oxygen has a valence of 6
Explanation:
Electrons present in the outer most shell of an atom is known as valence electrons.
Here oxygen has 6 valence electrons in its outermost shell while hydrogen has only one valence shell in its outermost shell
So here if hydrogen share its one electron with oxygen then its electron configuration becomes stable and if oxygen share its two electrons of the shell with two different hydrogen atoms then this will stable the electron configuration of oxygen.
So in this way hydrogen and oxygen forms bonds with each other and its bond sharing electrons will form bond.
so here correct answer will be
D. Hydrogen has a valence of 1 and oxygen has a valence of 6