An ideal gas obeying the kinetic theory of gases can be liquefied if

Options

A. Its temperature is more than its critical temperature `(T_(c))`
B. Its pressure is more than its critical pressure `(P_(c))`
C. Its pressure is more than `P_(c)` at a temperature less than `T_(c)`
D. It cannot be liquefied at any value of `P` and `T`

Explanation

To solve the question of whether an ideal gas can be liquefied, we need to analyze the properties of an ideal gas and the conditions required for liquefaction.

### Step-by-step Solution:

1. **Understanding Ideal Gas**:
An ideal gas is defined by the equation \( PV = nRT \), where:
- \( P \) = pressure
- \( V \) = volume
...