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
Concentration of tropicamide: 
Select and explain. 
A. 0.01, B. 0.02, C. 0.03, D. 0.04
A: 0.01
Answer: A: 0.01 
Explanation: Answer- A. 0.01Tropicamide is the shoest acting mydriatic, concentration used is 0.5-l% drops (0.005-0.010).Tropicamide:Concentration used: 0.5-l% drops (0.005-0.010)Duration of action: Though effective for upto 3 hours, maximum effect appear 30 minutes after the last drop and lasts for only 10-15 minutesUsed in Adults.