Final answer:
In a NOT gate, if the input A is true, the output C will be false as a NOT gate inverts its single input signal.
Therefore, the correct answer is: option (a) false
Step-by-step explanation:
The original question seems to have a typo or misunderstanding as a NOT gate only has one input.
However, addressing the concept directly: In a NOT gate, if the input A is true, the output C will be false.
A NOT gate, also known as an inverter, simply takes an input and outputs the opposite value.
If the input is true (or logical 1), the output will be false (or logical 0), and vice versa.