Read the following statements with reference to electronic devices.

(A) A transistor is used as a rectifier
(B) A zener diode is used as a voltage regulator
(C) A NOT gate is a universal gate
(D) A transistor is used as an amplifier
(E) A photodiode is used as an oscillator

Choose the correct answer from the options given below:

(B) and (D)

The correct answer is Option (2) → (B) and (D)

(B) Zener diode are specifically designed to maintain a current voltage across a circuit, making them ideal voltage regulators.

(D) Transistors are commonly used as amplifiers in electronic circuits to increase signal strength.