Concept:Enhancement mode means the conducting channel is created only after applying gate voltage.
This mode is present in MOSFET.
Explanation:MOSFET is divided into two main types: Depletion MOSFET and Enhancement MOSFET.
Depletion MOSFET has a built-in channel near the gate terminal at the time of manufacturing.
It can operate in both depletion mode and enhancement mode.
Enhancement MOSFET has no built-in channel.
When gate voltage is applied and reaches a threshold value, a channel is induced near the gate terminal.
So Enhancement MOSFET can work only in enhancement mode.
In JFET, the channel is already diffused between drain and source during construction.
Therefore, JFET does not require enhancement and works only in depletion mode.
Tunnel diode and PIN diode are not field-effect devices, so they do not support enhancement mode.
Thus, enhancement mode is present only in MOSFET.
Answer:Option D - MOSFET