Question

The circuit consisting of NAND gates that is equivalent to an AND gate is:

• A.
• B.
• C.
• D.

Hint:

NAND gates are universal gates and can be combined to implement any logic function including AND, OR, and NOT.

Answer 1

The Correct Option is B

Using Boolean logic, an AND gate can be constructed by combining NAND gates as follows: \[ {AND}(A,B) = {NAND}({NAND}(A,B), {NAND}(A,B)) \] This means the output of a NAND gate is fed into another NAND gate acting as an inverter, which results in AND operation. 
The second circuit (Option B) shows this correct configuration.