Match the $\frac{C _{ P }}{ C _{ v }}$ ratio for ideal gases with different type of molecules
| Moleculae type | $\frac{C _{ P }}{ C _{ v }}$ |
| $(A)$ Monoatomic | $(I)$ $\frac{7}{ 5}$ |
| $(B)$ Diatomic rigid molecules | $(II)$ $\frac{9}{7}$ |
| $(C)$ Diatomic non-rigid molecules | $(III)$ $\frac{4}{3}$ |
| $(D)$ Triatomic rigid molecules | $(IV)$ $\frac{5}{3}$ |
JEE MAIN 2020, Medium
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