Which among the following is used to dilute oxygen in the gas cylinders used by divers ?

Options

A. Krypton
B. Argon
C. Helium
D. Neon

Answer

C

Explanation

Helium is used to dilute the oxygen and nitrogen to reduce these affects. Helium is the gas of choice to use because it is an insert gas , is thinner, therefore more compressible than air, and its narcotic properties are negligible in comparison to nitrogen.