Non-polar covalent bond is formed between:

Explanation

Option A: Non-polar covalent bonds form between two atoms of the same element or between different elements that share the electrons equally. For example, an oxygen atom can bond with another oxygen atom to fill its outer shell.Option B: Heteronuclear diatomic molecules: If the two atoms in a covalent bond have different electronegativities, the electron pair is pulled closer to the more electronegative atom, resulting in a polar covalent bond. Examples of heteronuclear diatomic molecules include HCl, CO, and HF. Option C: Similar atoms: The term "similar atoms" is vague and doesn't provide enough information to determine whether a bond would be polar or nonpolar. If the atoms have similar electronegativities, a nonpolar covalent bond may be formed, but if they have different electronegativities, a polar covalent bond would result.Option D: Dissimilar atoms: If the atoms in a covalent bond are dissimilar and have different electronegativities, the bond is likely to be polar covalent rather than nonpolar.