$pent-3-ol$ is a

What is denatured alcohol?

Product $(C)$ is

Phenyl magnesium bromide reacts with methanol to give

In the presence of $H_2SO_4$,ether is obtained from ethyl alcohol at which of the following temperatures (in $K$)?

An organic compound $(A)$ reacts with sodium metal to form $(B)$. When $(A)$ is heated with concentrated $H_2SO_4$,it produces diethyl ether. What are $(A)$ and $(B)$ respectively?