Step 1: Nature of age condition under HMA.
Section 5(iii) prescribes minimum ages. Contravention of this clause does not render a marriage void/voidable under the HMA.
Step 2: Consequence in law.
Such a marriage remains valid; however, there is penal liability (earlier under HMA s.18, now primarily under the Prohibition of Child Marriage Act, 2006).
Step 3: Eliminate alternatives.
(a) “Valid” is incomplete without recognizing penal consequence.
(b) and (c) incorrect for marriages solemnized under HMA (unless void under the 2006 Act’s special circumstances).
\[
\boxed{(d)}
\]