Match List I with List II

	List-I		List-II
A)	Attenuation	I.	Combination of a receiver and transmitter.
B)	Transducer	II.	process of retrieval of information from the carrier wave at receiver
C)	Demodulation	III.	converts one form of energy into another
D)	Repeater	IV.	Loss of strength of a signal while propagating through a medium.

Choose the correct answer from the options given below :

	A	B	C	D
1)	IV	III	I	II
2)	II	III	IV	I
3)	I	II	III	IV
4)	IV	III	II	I