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
All are related to difficult intubation EXCEPT: 
Select and explain. 
A. Miller's sign, B. TMJ ankyloses, C. Increased thyromental distance, D. Micrognathia
C: Increased thyromental distance
Answer: C: Increased thyromental distance 
Explanation: 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