Well, whatever you call (or no-call) on this play, you're going to have some 'splanin to do Lucy!!!!
A jump ball may be the easiest call to sell here even though, by rule, it is not the correct call.
I would venture to say that a majority of officials, given this play in a game situation, would call a jump ball if there was no contact other than B1 on the ball with his body.