This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Preoperative Assessment, Subject name: Anaesthesia
[{'content': "All are related to difficult intubation EXCEPT: \nSelect and explain. \nA. Miller's sign, B. TMJ ankyloses, C. Increased thyromental distance, D. Micrognathia", 'role': 'user'}, {'content': 'Answer: C \nExplanation: ANSWTER: (C) Increased thyromental distanceREF: Morgan 4th ed p. 924Indirect repeat from December 2009Signs of difficult intubation:Thyromental distance < 7cmsMallampatti grade III or IVMicrognathiaMacroglossiaHigh arched palate with narrow dental archTMJ limitationLimited cervical vertebrae extensionMiller signGrowth in oral cavity', 'role': 'assistant'}]