W + T - H means W is the mother of T and T is the father of H
W ÷ T - H means W is the brother of T and T is the father of H
W × T + H means W is the sister of T and T is the mother of H
W ÷ M + H means W is the brother of M and M is the mother of H
From any of the statement we can't say W is grandfather of H.
Hence none of these is the correct answer.