Cyclohexanol is a

Which combination of alkyl bromide and epoxide can be used to prepare the following product by addition of the Grignard reagent derived from the alkyl bromide to the epoxide?

The major product of the following reaction is:

When ethanol is treated with sulphuric acid at $413 \ K$,the reaction involved in it is:

An alcohol having molecular weight $74$ gives white turbidity with Lucas reagent within $5-10$ minutes. It reacts with sodium metal to give $Y$. $Y$ reacts with $CH_3-Br$ to give $Z$. $Z$ is:

Which is the best method to prepare cyclohexene from cyclohexanol?