Which of the following is the strongest base?

Match List-$I$ with List-$II$:
Benzenediazonium chloride $(C_6H_5N_2^+Cl^-)$ is reacted with reagents in List-$I$ to form products in List-$II$.
| List-$I$ (Reagent) | List-$II$ (Product) |
| :--- | :--- |
| $A$. Aniline $(C_6H_5NH_2)$ | $I$. Fluorobenzene $(C_6H_5F)$ |
| $B$. $HBF_4, \Delta$ | $II$. Benzonitrile $(C_6H_5CN)$ |
| $C$. $Cu, HCl$ | $III$. $p$-Aminoazobenzene $(C_6H_5-N=N-C_6H_4-NH_2)$ |
| $D$. $CuCN/KCN$ | $IV$. Chlorobenzene $(C_6H_5Cl)$ |
Choose the correct answer from the options given below:

What is the correct order of basicity for the substituted anilines ($I$ to $IV$)?

Which of the following compounds is obtained when a quaternary ammonium hydroxide is strongly heated?

Which of the following statements is correct?

In the given reaction $A$ is :- $A$ $\xrightarrow{\text{Reduction}} B$ $\xrightarrow{HNO_2} C_2H_5OH$