Match the following:

	List I (I/P - O/P relation)		List II (Property of the system)
A.	y(n) = x(n)	1.	Nonlinear, non-causal
B.	y(n) = x(n2)	2.	Linear, non casual
C.	y(n) = x2(-n)	3.	Linear causal
D.	y(n) = x2(n)	4.	Nonlinear causal