This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Drugs, Subject name: Ophthalmology
[{'content': 'Strongest cycloplegic is - \nSelect and explain. \nA. Atropine, B. Homatropine, C. Cyclopentolate, D. Tropicamide', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Atropine Rough estimate of refractive error after retinoscopy:o Objectively a rough estimate of error of refraction is made by taking into account the retinoscopy findings and following deductions.i) Deduction of 1D for 1 m and 1.5 D when retinoscopy is performed at 2/3rd m (67 cm) distance.ii) Deduction for cycloplegic (1D for atropine, 0.5D for homatropine, 0.75 D for cyclopentolate).Amount of refractive error = Retinoscopic finding - deduction for distance - deduction for cycloplegic.o Maximum deduction is required for atropine as it's the strongest cycloplegic.", 'role': 'assistant'}]