<Tr> <Th_colspan="2"> Component pitches </Th> </Tr> <Tr> <Td_colspan="2"> A, B, C ♯, D, E, F ♯, G ♯ </Td> </Tr> <P> A major (or the key of A) is a major scale based on A, with the pitches A, B, C ♯, D, E, F ♯, and G ♯ . Its key signature has three sharps . </P> <P> Its relative minor is F - sharp minor and its parallel minor is A minor . The key of A major is the only key where a Neapolitan sixth chord on 2 ^ (\ displaystyle (\ hat (2))) requires both a flat and a natural accidental . </P>

How many sharps in the key of a