# Which of the following is the universal gate? (a) OR (b) NOT (c) AND (d) NAND

Option (d) NAND is the correct answer

NAND gate and NOR gate are called the universal logic gates. The repeated use of a NOR or a NAND gate alone can produce all three basic logic gates. Hence, they are called universal logic gates.

Among the following, the NAND gate is the universal gate.