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
Which is the shoest acting mydriatic 
Select and explain. 
A. Atropine, B. Homatropine, C. Tropicamide, D. Cyclopentolate
C: Tropicamide
Answer: C: Tropicamide 
Explanation: C i.e. Tropicamide