Hand ball...by the referee!

[Back In The Saddle]

Saw this in an AAU game earlier this week. A is taking an end line throw in. Ref hands the ball to A1, and then starts to back out while begining his count. A1 makes a very quick throw which strikes the referee's counting hand and deflects, otherwise untouched, out of bounds over the side line.

Is this:

a) OOB violation on the ref for being the last to touch it?
b) OOB violation on A?
c) Throw-in violation on A for throwing it OOB untouched by any player?
d) Throw-in violation on A for not throwing the ball directly into the court?
e) Too weird to call anything, just blow it dead and "reset"?