How many AND gates are required to construct a 4 – bit parallel multiplier if four 4 – bit parallel binary adders are given?

A)
Two 2 – input AND gates
B)
Four 2 – input AND gates
C)
Eight 2 – input AND gates
D)
Sixteen 2 – input AND gates

Correct Answer : Option (D) :   Sixteen 2 – input AND gates


Explanation : Four 4 – bit parallel binary adders along with 16 number of 2 – input AND gates will be required to construct a 4 – bit parallel multiplier. The AND gate helps in getting the partial products while the parallel – adder are used to add the partial products.