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: Pharmacology
Which one of the following drugs does not induce mydriasis: 
Select and explain. 
A. Phentolamine, B. Ephedrine, C. Phenylephrine, D. Cocaine
A: Phentolamine
Answer: A: Phentolamine 
Explanation: None