A full adder is to be implemented using half adders and OR gates. A 4 bit parallel adder without any initial carry requires

A full adder is to be implemented using half adders and OR gates. A 4

1.	A full adder is to be implemented using half adders and OR gates. A 4 bit parallel adder without any initial carry requires
A.	8 half adders and 4 OR gates
B.	8 half adders and 3 OR gates
C.	7 half adders and 3 OR gates
D.	7 half adders and 4 OR gates
Answer» D. 7 half adders and 4 OR gates