Which of the following is the $IUPAC$ name of hydroquinone?

Write the equations involved in the following reactions:
$(i)$ Reimer-Tiemann reaction
$(ii)$ Kolbe's reaction

Given below are two statements:
Statement $I$: Phenol on treatment with $CHCl_3 / aq. KOH$ under refluxing condition,followed by acidification produces $p$-hydroxybenzaldehyde as the major product and $o$-hydroxybenzaldehyde as the minor product.
Statement $II$: The mixture of $p$-hydroxybenzaldehyde and $o$-hydroxybenzaldehyde can be easily separated through steam distillation.
In the light of the above statements,choose the correct answer from the options given below:

Which among the following is the strongest $o, p-$directing group?

Identify the correct set from the following:

Compound

$p K_a$

Which of the following reactions is used to obtain salicylic acid from phenol?