Which of the following compounds has the highest boiling point?

The major product of the following reaction sequence is:
Aniline $\xrightarrow[(i) NaNO_2, HCl, 273-278K]{(ii) H_2O, warm} \text{Product}$ $\xrightarrow[(iv) NaOH]{(iii) Br_2, (excess)} \text{Product}$ $\xrightarrow{(v) CH_3I} \text{Final Product}$

The order of melting point of ortho-,meta-,and para-nitrophenol is

Hybridisation shown by Carbon and Oxygen of $-OH$ group in phenol are respectively . . . . . . .

The reaction sequence is as follows:
$Catechol \xrightarrow{(i) CHCl_3 + KOH}{(ii) CH_2I_2 + NaOH} [X]$
Here $[X]$ is:

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