The correct answer is: B. Linear
A linear device is a device whose output is directly proportional to its input. In other words, if you double the input, the output will double. This is represented by a straight line on a graph of input versus output.
A nonlinear device is a device whose output is not directly proportional to its input. In other words, if you double the input, the output may not double. This is represented by a curve on a graph of input versus output.
An active device is a device that can amplify a signal. This means
that it can take a small input signal and produce a larger output signal. Active devices are often used in amplifiers, oscillators, and other electronic circuits.A bipolar device is a type of transistor that has two types of charge carriers: electrons and holes. Bipolar transistors are often used in amplifiers and switching circuits.
None of the above is not a correct answer.