E7A07

What logical operation does a NAND gate perform?

1. AIt produces a 0 at its output only if all inputs are 0
2. BIt produces a 1 at its output only if all inputs are 1
3. CIt produces a 0 at its output if some but not all inputs are 1
4. DIt produces a 0 at its output only if all inputs are 1

Pick an answer to check it.