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
[{'content': 'Angular stomatitis \nSelect and explain. \nA. can be a concomitant of any candidal infection, B. is seen mainly in adults, C. may be associated with streptococcus, D. may be a sign of anaemia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]