Q138 / 180 · AIIMS 2007 · Physics

Assertion : NAND is a universal gate. Reason : It can be used to describe all other logic gates.

  • Correct answer
    A
    If both assertion and reason are true and reason is the correct explanation of assertion
  • B
    If both assertion and reason are true but reason is not the correct explanation of assertion
  • C
    If assertion is true but reason is false
  • D
    If both assertion and reason are false.

Solution

NAND and NOR gates are treated as universal gates because all other basic gates AND gate OR gate and NOT gate can be constructed using only NAND gate (or NOR gate).

Hence, the correct answer is option: 'A'.

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