In which of the following adder circuits, the carry look ripple delay

1.	In which of the following adder circuits, the carry look ripple delay is eliminated ?
A.	half adder
B.	full adder
C.	parallel adder
D.	carry- look- ahead adder
Answer» D. carry- look- ahead adder

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In which of the following adder circuits, the carry look ripple delay is eliminated ?

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