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: Anaesthesia
[{'content': 'Contraindications of laryngeal mask airway are all except \nSelect and explain. \nA. Pregnancy, B. Hiatus hernia, C. Oropharyngeal tumor, D. Difficult airway management', 'role': 'user'}, {'content': 'Answer: D \nExplanation: LMA is used when difficult intubation is anticipated.', 'role': 'assistant'}]