The term “widower” (except when used in the first sentence of section 402(i) of this title ) means the surviving husband of an individual, but only if (A) he is the father of her son or daughter, (B) he legally adopted her son or daughter while he was married to her and while such son or daughter was under the age of eighteen, (C) she legally adopted his son or daughter while he was married to her and while such son or daughter was under the age of eighteen, (D) he was married to her at the time both of them legally adopted a child under the age of eighteen, (E) except as provided in paragraph (2), he was married to her for a period of not less than nine months immediately prior to the day on which she died, or (F) in the month before the month of his marriage to her (i) he was entitled to, or on application therefor and attainment of age 62 in such prior month would have been entitled to, benefits under subsection (c), (f) or (h) of section 402 of this title , (ii) he had attained age eighteen and was entitled to, or on application therefor would have been entitled to, benefits under subsection (d) of such section (subject, however, to section 402(s) of this title ), or (iii) he was entitled to, or on application therefor and attainment of the required age (if any) he would have been entitled to, a widower’s, child’s (after attainment of age 18), or parent’s insurance annuity under section 231a of title 45 .