Which element exists as a solid at $25\,^{\circ}C$ and $1$ atmospheric pressure among the following?

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 :

How will you separate a mixture of benzene and chloroform?

What is the principle of distillation?

In the fractional distillation of crude petroleum,which of the following statements is correct?

Physical properties of ice,water and steam are very different. What is the chemical composition of water in all the three states?