Answer:
d) A mosfet
Explanation:
MOSFET is the most common type of insulated gate Field Effect Transistor (FET), used in electronic circuits and it stands for Metal Oxide Semiconductor Field Effect Transistor.
To configure MOSFET to act as an amplifier, a small AC signal is applied, which is superimposed on to DC bias at the gate input, then the MOSFET will act as a linear amplifier.
Therefore, the correct option is (d) A mosfet
