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: Pathology
Patches are circumscribed, flat lesion distinguished  from  surrounding skin, size of which is greater than 
Select and explain. 
A. 1 mm, B. 2.5 mm, C. 5 mm, D. 10 mm
C: 5 mm
Answer: C: 5 mm 
Explanation: Size of macule is less than 5 mm or less.
Size of patch is  greater than 5 mm.