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
Horner's syndrome, all are true except: 
Select and explain. 
A. Unilateral loss of sweating, B. Enophthalmos, C. Mydriasis, D. Ptosis
C: Mydriasis
Answer: C: Mydriasis 
Explanation: C i.e. Mydriasis