$O_2$ molecules consists of two oxygen atoms. In the molecule, Nuclear force between the nuclei of two atoms.

(A) is not important because Nuclear forces are short ranged
(B) is as important as electrostatic force for binding the two atoms
(C) cancels the repulsive electrostatic force between the nuclei
(D) not important because oxygen nucleus have equal no. of neutrons and protons

Choose the correct answer from the options given below:

(A) Only

The correct answer is Option (1) → (A) Only

The nuclear force between the two oxygen nuclei in an $O_2$ molecule is indeed very short-ranged and is not significant in holding the two atoms together in a molecule.