Rookie question

[Nevadaref]

1. a. legal action, in this case it is also legal for a defender to grab the ball and try to pull it away.
1. b. illegal. The thrower has violated. Team B's ball at that spot.

2. same as 1.

Rule citations:
9-2-10 NOTE: The thrower may penetrate the plane provided he/she does not touch the inbounds area before the ball is released on the throw-in pass. The opponent in this situation may legally touch or grasp the ball.

9.2.5 SITUATION: Thrower A1 inadvertently steps through the plane of the boundary line and touches the court inbounds. A1 immediately steps back into normal out-of-bounds throw-in position. The contact with the court was during a situation: (a) with; or (b) without defensive pressure on the throw-in team. RULING: A violation in both (a) and (b). COMMENT: Whether or not there was defensive pressure or whether or not stepping on the court was inadvertent, it is a violation and no judgment is required in making the call.