Correct option is C
The NAND gate is considered a universal gate because it can be used to implement the functionality of any other logic gate (AND, OR, NOT, XOR, etc.).
NAND Gate as a Universal Gate:
By combining multiple NAND gates, you can construct:
· NOT Gate: Connecting both inputs of a NAND gate to the same signal.
· AND Gate: Combining NOT and NAND gates.
· OR Gate: Using De Morgan’s laws with NAND gates.
Explanation of Other Gates:
· XOR Gate: Cannot be used alone to construct other gates.
· XNOR Gate: Similar to XOR, it is not a universal gate.
· AND Gate: Cannot create NOT or OR gates, so it is not universal.
