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
Duration of cycloplegic by atropine in an adult: 
Select and explain. 
A. 6 hours, B. 2-3 days, C. 7-10 days, D. 1-2 days
C: 7-10 days
Answer: C: 7-10 days 
Explanation: Ans. (c) 7 - 10 daysRef.: A.K. Khurana 6th ed. 1573, Khurana 4th ed./146Cycloplegics and its duration of actionDrugDuration of Effect (days)Atropine7-10Scopolamine3-7Homatropine1-3Cyclopentolate1Tropicamidedays (6 hrs)