So, what was the 'correct' answer to NCAA exam question 43?
43. A, 3/5 @ A-20... The QB muffs the snap and the ball rolls back to the A-10. The Left Guard picks up the ball and from the A-10 throws a pass beyond the line of scrimmage into an area unoccupied by an eligible Team A player. The “Passer” was outside the tackle box when the pass was thrown.
A. A, 3/5 @ A-20; legal play.
B. A, 4/15 @ A-10; intentional grounding.
C. A, 4/10 @ A-15; previous spot foul.
Unless I am mistaken, I believe B was the 'correct' answer, under the unpublished interpretation that only the person for whom the snap was 'intended' had the privilege to legally ground a forward pass. Either that was untrue, or someone had a change of heart.
Check AR 7-3-2-X in the 2012-2013 book.