If you give them the benefit of the doubt, as Calhoun said, it violates 7-2-4 as a snap infraction. If it doesn't pass the smell test, it violates 7-2-8 for a planned loose ball in the vicinity of the snapper.
Either way, S19, 5 yard penalty.
Planned loose ball is a live ball foul, so B could recover the ball. The snap infraction is a dead ball foul, so you'd kill that ASAP.