Consider the following expressions which indicate the step or impulse response of an initially relaxed system. Those which correspond to the step and impulse response of the same system include

Consider the following expressions which indicate the step or impulse

1.	Consider the following expressions which indicate the step or impulse response of an initially relaxed system. Those which correspond to the step and impulse response of the same system include
A.	1 and 3
B.	1 and 4
C.	2 and 4
D.	2 and 3
Answer» B. 1 and 4