What would you do?

[wyo-referee]

:10 seconds left on A's 1 yd. line, 20-17 is the score, A runs a running play and gets stuffed for a loss at the 3, they are out of TO's, trying to unpile the QB graps the defender laying on the RB with the ball by the back of the jersey and throws him off the pile. 6.7 seconds are now left, Do you:

A) call the PF on the QB, which will stop the clock and after penalty is stepped off gives them the chance to line-up and spike ball to stop clock and bring out the FG team?
B) ignore the PF and let clock run out?

Fed rules.