Which of the following acts as ionising gas in Geiger Muller counter?(a) Alcohol(b) Argon gas(c) Krypton(d) Hydrogen

Which of the following acts as ionising gas in Geiger Muller counter?(

1.	Which of the following acts as ionising gas in Geiger Muller counter?(a) Alcohol(b) Argon gas(c) Krypton(d) Hydrogen
Answer» The correct answer is (b) Argon gas To explain I would say: Argon gas acts as ionising gas in Geiger Muller counter. It is present in a gas type envelope along with the electrodes.