A volatile liquid: 

Volatility is the tendency for evaporation. A volatile liquid means it easily changes into a gaseous state even at room temperature. 

The phrase volatility refers to a substance's ability to "quickly evaporate." It is described in terms of vapor pressures and boiling temperatures rather than having a specific numerical number.
The majority of liquids can turn into gases through a process known as vaporization if enough kinetic energy is present. A liquid's ability to vaporize is determined by its chemical composition. Volatile liquids have observable vapor pressure and evaporate at room temperature.
Volatile liquids, in a nutshell, are substances that easily vaporize or evaporate at room temperature. Their boiling points are low. Among them are ethanol, acetone, gasoline, ether, etc.

As a result, at normal temperatures, volatile liquids evaporate quickly.

Hence, option A is correct.