A) 37°C
B) –196°C
C) 40°C
D) None of these
🧠 Explanation:
Liquid nitrogen’s temperature is -195.8°C, often rounded to -196°C. It’s super cold, used to freeze things. In Pakistan, it’s studied in science and used in labs or medicine. It’s important for preserving food, medical samples, or in industries, ensuring quality in healthcare and research.
