Question

Which of the following is the universal gate?

• A. OR
• B. NOT
• C. AND
• D. NAND

Answer 1

The correct option is D

NAND

Explanation for the correct option:

Option (D) NAND

1. NAND is the universal gate.
2. Universal gates can implement any Boolean function without using any other type of gate.
3. NAND and NOR gates are universal gates.

Explanation for the incorrect option(s):

1. Option (A) OR: It is a logic gate.
2. Option (B) NOT: It is also a type of logic gate.
3. Option (C) AND: It is also a type of logic gate.

Thus, the correct answer is option (D).