Question

Match the following. 
\[ \begin{array}{|c|l|c|l|} \hline \text{List-I} & & \text{List-II} & \\ \hline \text{A} & \text{Prontosil} & \text{I} & \mathrm{-SO_2NH-} \\ \hline \text{B} & \text{Sulphapyridine} & \text{II} & \mathrm{-NHCOCHCl-} \\ \hline \text{C} & \text{Salvarsan} & \text{III} & \mathrm{-N=N-} \\ \hline & & \text{IV} & \mathrm{-As=As-} \\ \hline \end{array} \] 
The correct answer is

• A. A-I, B-II, C-IV
• B. A-III, B-I, C-II
• C. A-III, B-I, C-IV
• D. A-IV, B-III, C-II

Hint:

Remember: \[ \boxed{ \begin{aligned} &\text{Prontosil} \rightarrow -\mathrm{N=N}- &\text{Sulpha drugs} \rightarrow -\mathrm{SO_2NH}- &\text{Salvarsan} \rightarrow -\mathrm{As=As}- \end{aligned} } \]

Answer 1

The Correct Option is C

Step 1: Identify the characteristic linkage of each drug. \[ \boxed{\text{Prontosil} \rightarrow -\mathrm{N=N}-} \] Prontosil is an azo dye. \[ \boxed{\text{Sulphapyridine} \rightarrow -\mathrm{SO_2NH}-} \] It is a sulfonamide drug. \[ \boxed{\text{Salvarsan} \rightarrow -\mathrm{As=As}-} \] Salvarsan is an organoarsenic compound. Hence, \[ \boxed{ A\!-\!III,\; B\!-\!I,\; C\!-\!IV } \] Therefore, \[ \boxed{(C)} \] is the correct answer.