(a) Any veteran who accepts the benefits of this chapter shall not by reason thereof be denied the benefits of chapter 37 of this title; however, except as provided in subsection (b) of this section, the assistance authorized by section 2101 of this title shall not be available to any veteran more than once.

(b) A veteran eligible for assistance under section 2101 (b) of this title shall not by reason of such eligibility be denied benefits for which such veteran becomes eligible under section 2101 (a) of this title or benefits relating to home health services under section 1717 (a)(2) of this title. However, no particular type of adaptation, improvement, or structural alteration provided to a veteran under section 1717 (a)(2) of this title may be provided to such veteran under section 2101 (b) of this title.