A) $C_{6}H_{5}COOH,\ \left( CH_{3} \right)_{2}SO_{4},\ NaOH$
B) $C_{6}H_{5}COCl,\ C_{2}H_{5}OH$
C) $C_{6}H_{5}COOH,\ CH_{2}N_{2},\ \mathrm{\Delta}$
D) $C_{6}H_{5}COOC_{2}H_{5},\ CH_{3}OH,\ H_{2}SO_{4}$
Explanation
The correct answer is Option B: $C_{6}H_{5}COCl,\ C_{2}H_{5}OH$.
A detailed explanation for this question is being prepared.