Which of the following cannot be prepared by Williamson synthesis?

This reaction can be classified as:

The reaction of chloroethane with $Y$ gives $NaCl$ and $Z$. The reaction of one mole of $Z$ with two moles of $HI$ gives water and iodoethane. What is $Y$?

In Williamson synthesis,ethoxyethane is prepared by:

Explain the reaction of anisole with $HI$.

Which of the following can be prepared effectively by Williamson ether synthesis?