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: Medicine
Associated with obstructive sleep apnea are all of the following except: March 2011 
Select and explain. 
A. Acromegaly, B. Obese, C. Males, D. Protruding jaw
D: Protruding jaw
Answer: D: Protruding jaw 
Explanation: Ans. D: Protruding jaw Predisposing factors to the sleep apnea/ hypoapnea syndrome include being male, which doubles the risk probably due to a testosterone effect on the upper airway, and obesity, found in about half of the patients, because parapharyngeal fat deposits tend to narrow the pharynx. Nasal obstruction or a recessed mandible can fuher exacerbate the problem Acromegaly and hypothyroidism also predispose by causing submucosal infiltration and narrowing of the upper airway