Identify $X$ and $Y$ in the following reactions:

The given reaction can occur in the presence of:
$(1)$ Bromine water
$(2)$ $Br_2$ in $CS_2, 273 \ K$
$(3)$ $Br_2 / FeBr_3$
$(4)$ $Br_2$ in $CHCl_3, 273 \ K$
Choose the correct answer from the options given below:
[Image: Phenol reacting to form p-bromophenol as the major product]

Which of the following is a true statement about the reaction shown?

The common name of $Benzene-1,4-diol$ is

What product is obtained during the hydrogenation of phenol in the presence of a nickel catalyst at $160\,^oC$?

Which of the following compounds will most easily be attacked by an electrophile?