The logic circuit of binary adder which is used to add 4-bits binary n – McqOptions

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1.	The logic circuit of binary adder which is used to add 4-bits binary numbers, requires _________ half adder (s) and ________ full adder(s).
A.	1,3
B.	3,1
C.	2,2
D.	4,0
Answer» B. 3,1

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