JEE Main 2023 Physics question

A flask contains Hydrogen and Argon in the ratio 2 : 1 by mass. The temperature of the mixture is 30°C. The ratio of average kinetic energy per molecule of the two gases (K argon/K hydrogen) is: (Given : Atomic Weight of Ar = 39.9)

• (A)2
• (B)1Correct
• (C)39.9
• (D)