We match each compound with its characteristic reagent/test.

1. Match lysine

Lysine is an $\alpha$-amino acid. Amino acids give the ninhydrin test.

$\text{Lysine} \to \text{ninhydrin} = (Q)$

So, $(A) \to (Q)$

2. Match furfural

Furfural is an aldehyde formed from carbohydrates and gives a characteristic color reaction with $1$-naphthol (Molisch-type related carbohydrate test chemistry).

$\text{Furfural} \to 1\text{-naphthol} = (P)$

So, $(B) \to (P)$

3. Match benzyl alcohol

Benzyl alcohol is an alcohol, and ceric ammonium nitrate is a standard reagent used to test alcohols.

$\text{Benzyl alcohol} \to \text{ceric ammonium nitrate} = (S)$

So, $(C) \to (S)$

4. Match styrene

Styrene contains a carbon-carbon double bond. Unsaturation is detected by oxidation with $\mathrm{KMnO_4}$ (Baeyer’s reagent).

$\text{Styrene} \to \mathrm{KMnO_4} = (R)$

So, $(D) \to (R)$

5. Final matching

Thus the correct set is:

$(A) \to (Q), \quad (B) \to (P), \quad (C) \to (S), \quad (D) \to (R)$

This corresponds to Option B.