If an individual is eligible (but for subsection (k)(4)) for an old-age insurance benefit in any month for which the individual is entitled to a wife’s or husband’s insurance benefit (except in the case of entitlement pursuant to clause (ii) of subsection (b)(1)(B) or subsection (c)(1)(B), as appropriate), such individual shall be deemed to have filed an application for old-age insurance benefits—

(A) for such month, or

(B) if such individual is also entitled to a disability insurance benefit for such month, in the first subsequent month for which such individual is not entitled to a disability insurance benefit.