In both liquid water and ice, a hydrogen bond forms between a) a pair of oxygen atoms on adjacent molecules b) the oxygen atom of one molecule and a hydrogen atom of an adjacent molecule c) a pair of hydrogen atoms on adjacent molecules d) an oxygen atom and a hydrogen atom in the same molecule

b) the oxygen atom of one molecule and a hydrogen atom of an adjacent molecule

Explanation:

In a H₂O molecule there are two O-H bonds. The O atom being more electronegative pulls away the shared pair of electron in the covalent bond more towards itself thus O gaining a partial negative charge and H atom getting a partial positive charge. Thus a dipole exists in the O-H bond in the H₂O molecules. Thus in both liquid water and solid ice there is a weak attraction or hydrogen bond between the oxygen atom of one H₂O molecule and a hydrogen atom of an adjacent H₂O molecule.