Match the compounds given in Column I with the items given in Column II.
| Column I | Column II | ||
| A. | Benzene sulphonyl chloride | I. | Zwitter ion |
| B. | Sulphanilic acid | II. | Hinsberg reagent |
| C. | Alkyl diazonium salts | III. | Dyes |
| D. | Aryl diazonium salts | IV. | Conversion to alcohols |
Codes:
| A | B | C | D | |
| 1. | II | I | IV | III |
| 2. | III | I | IV | II |
| 3. | I | IV | III | II |
| 4. | IV | III | II | I |
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