If defensive player B-1 deflects A-1's pass with his/her leg, what is the ruling?

In the scenario where defensive player B-1 deflects A-1's pass with their leg, the ruling is that the action constitutes a violation on B-1. According to basketball rules, a player cannot intentionally use their body to interfere with the ball in a way that affects the play, especially if it is considered an unintended violation of normal play.

When a defensive player deflects a pass with a body part that is not typically used to play the ball, such as a leg, it disrupts the flow of the game. However, in this case, it does not result in a foul because there is no illegal contact or intent to harm. Instead, it is categorized as a violation due to the interference with the passing action.

This ruling allows the play to continue appropriately without imposing penalties that would be associated with fouls, thus ensuring that the game flows smoothly. In this instance, the violation does not give an advantage to either team, so the situation is resolved by recognizing the infraction without further consequence.