A conducting square loop is located completely inside a uniform magnetic field perpendicular to the plane of the loop. The plane of the loop is in  xy  plane with sides parallel to x  and y  axes. 
Match the number of sides of the square loop in which emf is developed
 

	COLUMN-I		COLUMN-II
P)	B is constant in time and the loop shrinks symmetrically	1)	0
Q)	B is constant in time and the loop moves along  x axis	2)	2
R)	B is constant in time and the loop moves along $y=x$	3)	4
S)	The loop is at rest and  $\frac{dB}{dt}$ is constant	4)	1