Match List I (Drugs / Chemicals) with List II (Their uses) and select the correct answer using the codes given below the Lists: List I - List II 1. I. Atropine - A) Local anaesthesia 2. II. Ether - B) Heart trouble 3. III. Nitro-glycerine - C) Dilation of pupil 4. IV. Pyrethrin - D) Mosquito control

This question requires matching drugs/chemicals with their uses. 1. Atropine is used medically for various purposes, including causing dilation of the pupil (mydriasis) for eye examinations (C). So, I matches C. 2. Ether (diethyl ether) was historically used as a general anesthetic, but due to flammability and side effects, safer alternatives are now preferred. It can also be used as a solvent. Among the options, it relates most closely to anesthesia, though 'Local anaesthesia' (A) isn't entirely accurate as it was primarily a general anesthetic. However, given the choices, it's the most plausible link in older contexts or simplified classifications. So, II matches A. 3. Nitro-glycerine (Glyceryl trinitrate) is used to treat angina (chest pain) and other heart troubles by dilating blood vessels (B). So, III matches B. 4. Pyrethrin is a natural insecticide derived from chrysanthemum flowers, commonly used for mosquito control (D). So, IV matches D. 5. The correct matching sequence is I-C, II-A, III-B, IV-D.