Calculate the value of $x + \text{molecular mass of } (C)$,where $x$ is the number of moles of $PhMgBr$ consumed in reaction $(a)$ and $(C)$ is the gas evolved in reaction $(b)$.
$(a)$ $3\text{-hydroxy-5-formylbenzoyl chloride} + x \ PhMgBr \xrightarrow{\text{excess}} (A)$
$(b)$ $2,5\text{-dioxocyclohexanecarboxylic acid} \xrightarrow{\Delta} (B) + (C) \uparrow$

The major product in the following reaction is

$4-$methylbenzene sulphonic acid reacts with sodium acetate to give:

Answer the following by appropriately matching the lists based on the information given in the paragraph. List-$I$ includes starting materials and reagents of selected chemical reactions. List-$II$ gives structures of compounds that may be formed as intermediate products and/or final products from the reactions of List-$I$.
$(1)$ Which of the following options has correct combination considering List-$I$ and List-$II$?
$(1) (III), (T), (R)$ $(2) (IV), (Q), (R)$ $(3) (III), (T), (U)$ $(4) (IV), (Q), (U)$
$(2)$ Which of the following options has correct combination considering List-$I$ and List-$II$?
$(1) (I), (Q), (R)$ $(2) (II), (S), (U)$ $(3) (II), (P), (S), (T)$ $(4) (I), (S), (Q), (R)$
Give the answer for question $(1)$ and $(2)$.

The correct order of acidity for the following compounds is:

The product $(A)$ of the reaction is: