Question

Given below are two statements :
one is labelled as
Assertion (A) and the other is labelled as
Reason (R).
Assertion (A) :
In a ripple carry adder, carry propagation delay increases linearly with the number of bits.
Reason (R) :
Each bit addition must wait for the carry output from the previous stage.
In the light of the above statements, choose the most appropriate answer from the options given below :

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

To fix this "linear" bottleneck, modern CPUs use Carry Look-ahead Adders (CLA), which calculate carries in parallel using logic, making the delay logarithmic instead of linear.

Answer 1

The Correct Option is A