I think ref18 and Lotto give pretty good thoughts here. I think ref18 has given you the only possible options. And unfortunately, Juulie, the one you chose is the only one that I think was definitely incorrect.
Since the try never left A1's hands, Team A never lost team control. That means that if there is a held ball with the arrow pointing to Team A, there is no reset of the shot clock. That's NCAA 2-13.7.d.
So that leaves held ball to A with the time remaining on the shot clock, or shot clock violation and ball to B with a new 30 (women) or 35 (men).
And the one you choose will depend on whether you think B1 prevented the release of the ball prior to the shot clock horn sounding, or after it sounded. If your whistle blew for a held ball before the shot clock sounded, then give the ball to Team A with 1 second on the shot clock. If the horn sounded before your whistle, then I'd go with the shot clock violation.
And hopefully, you
will need to know this stuff for next season, right?!?!
