A student pushes box P, which is in direct contact with box Q, on a smooth horizontal table. Consider the following forces acting at the same instant:
F1: Force of the student’s hand on box PF2: Force of box P on the student’s hand
F3: Force of box P on box QF4: Force of box Q on box P
Which option lists all and only the action–reaction pairs among these forces?
a) F2 and F4 only
b) Both pairs F1 \& F2 and F3 \& F4
c) F1 and F2 only
d) F3 and F4 only