Which of the following methods is adopted to obtain gasoline from crude oil?

Given below are two statements :
Statement-$I$: Sublimation is used for the separation and purification of compounds with low melting point.
Statement-$II$: The boiling point of a liquid increases as the external pressure is reduced.
In the light of the above statements, choose the correct answer from the options given below :

What is the principle of distillation?

Which of the following substances sublimes upon heating?

$A$ miscible mixture of $C_6H_6 + CHCl_3$ can be separated by

Which of the following is an example of a heterogeneous mixture?