Physics · PYQ NEET UG 2017

A gas mixture consists of 2 moles of \( \text{O}_2 \) and 4 moles of \( \text{Ar} \) at temperature T. Neglecting all vibrational modes, the total internal energy of the system is

1. A
   \( 4\text{ RT} \)
2. B
   \( 15\text{ RT} \)
3. C
   \( 9\text{ RT} \)
4. D
   \( 11\text{ RT} \)