This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
Shoest acting mydriatic is? 
Select and explain. 
A. Tropicamide, B. Atropine, C. Phenylephrine, D. Hyoscine
A: Tropicamide
Answer: A: Tropicamide 
Explanation: Tropicamide REF: khurana 4th ed p. 68 shoest acting mydriatic - Tropicamide Only mydriatic and not cycloplegic - phenylephrine Used in children - Atropine