If the specific heats of a monoatomic gas and a diatomic gas are the same, which relation is valid?

$C_{v}$ and $C_{p}$ denote the molar specific heat capacities of a gas at constant volume and constant pressure,respectively. Then
$(A)$ $C_{p}-C_{v}$ is larger for a diatomic ideal gas than for a monoatomic ideal gas
$(B)$ $C_{p}+C_{v}$ is larger for a diatomic ideal gas than for a monoatomic ideal gas
$(C)$ $C_{p} / C_{v}$ is larger for a diatomic ideal gas than for a monoatomic ideal gas
$(D)$ $C_{p} \cdot C_v$ is larger for a diatomic ideal gas than for a monoatomic ideal gas

The adiabatic Bulk modulus of a diatomic gas at atmospheric pressure is

What is the ratio of specific heats at constant pressure and constant volume for $NH_3$?

If a gas has $n$ degrees of freedom,the ratio of specific heats of the gas is:

If a gas has $n$ degrees of freedom, then the ratio of $\frac{C_p}{C_V}$ is