Consider the following statements (A) and (B) and identify the correct answer. A. A zener diode is connected in reverse bias when used as a voltage regulator. B. The potential barrier of p-n junction lies between 0.2 V to 0.3 V. 1. (A) is correct and (B) is incorrect. 2. (A) is incorrect and (B) is correct. 3. (A) and (B) both are correct. 4. (A) and (B) both are incorrect .[NEET 2021 ]