Which one of the following is not hypovalent molecules / species?

Explanation:

Hypovalent molecules- These molecules are electron-deficient species whose central atom has less than 8 electrons(octet rule).

Generally, ionic species are not hypovalent.

AlCl3 is covalent so it is hypovalent and it contains 6 electrons in valence shell of Al.

BeCl2 has 4 electrons on the central atom Be. So, it is hypovalent.

HCO3- has 8 electrons on central atom C. So. it is not hypovalent.

Final Answer:
Hence, Option (A) and (C) is correct.