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': 'Prolonged use of antibiotics in children can result in \nSelect and explain. \nA. Necrotising ulcerative gingivtis, B. Candidiasis, C. Actinomycosis, D. Apthous ulcers', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]