Technician a Says That It Is Normal for the Piston

Multiple Choice

Technician A says that it is normal for the piston to remain stationary at TDC for a few degrees of crankshaft rotation. Technician B says that if the intake valve is open more at TDC than the exhaust valve, the cam is retarded. Who is right?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B