Two Boxes P and Q on a Perfectly Smooth Horizontal $\overrightarrow { \mathbf { F } }$

Multiple Choice

Two boxes P and Q on a perfectly smooth horizontal surface are connected by a light horizontal cord. The mass of P is greater than that of Q. A horizontal force $\overrightarrow { \mathbf { F } }$ is applied to box Q as shown in the figure, accelerating the bodies to the right. The magnitude of the force exerted by the connecting cord on body P is

A) zero.
B) less than F but not zero.
C) equal to F.
D) greater than F.