Fed: Illegal Forward Pass?

[Suudy]

Here's a question from the WA state clinic. It is in regards to illegal forward passes and that there cannot be roughing the passer on an illegal forward pass (i.e. the change to 2.32.11).

Team A's ball 3rd and 10 on the A 30 yard line. QB A15 crosses LOS, retreats behind the line and throws a pass. He is contacted late by B47 after releasing the ball. Which of the following statements is INCORRECT.

a. Roughing Passer
b. Personal Foul on B47
c. Penalties will offset
d. Illegal Forward Pass

The clinic says it is a. How is it not roughing the passer? As far as I can tell from the rule book, this is covered in rule 7.5, i.e.:

7.5.1 It is a legal forward pass, if during a scrimmage down and before team possession has changed, a player of A throws the ball with both feet of the passer in or behind the neutral zone when the ball is released. Only one forward pass my be thrown during the down.

Looks good to me from the above play.

7.5.2 An illegal forward pass is a foul. The illegal forward passes are: a) A pass after team possession has changed during the down, b) A pass from beyond the neutral zone, c) A pass intentionally thrown into an area not occupied by an eligible reeiver, d) A pass intentionally thrown incomplete to save loss of yardage or to conserve time e) A second or subsequent forward pass thrown during a down.

Again, looks good. None of these events apply to the original play.

Thus, A15 is a passer, and the contact by B57 is roughing. Am I screwing this one up?