Rectifier
Flip Flop
Comparator
Attenuator E. None of these
Answer is Wrong!
Answer is Right!
The correct answer is B. Flip Flop.
A flip-flop is a type of electronic circuit that has two stable states. It can be used to store data, and is the basic building block of memory devices.
A rectifier is a device that converts alternating current (AC) to direct current (DC).
A comparator is a device that compares two signals and outputs a signal indicating which signal is greater.
An attenuator is a device that reduces the amplitude of a signal.
None of these devices are used as memory devices in computers.