A NAND gate combines the NOT gate and the AND gate.
For inputs P and Q, the boolean expression for the NAND gate is c. NOT (P AND Q)
The NAND gate means:
NOT AND
Assume the inputs are x and y, then the formula would be:
NOT (x AND y)
In this case, the input variables are P and Q.
So, we replace x and y with P and Q, respectively.
The formula becomes NOT (P AND Q)
Hence, the correct expression is (c)
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