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: ENT
Which of the following is not true about acute retropharyngeal absess: 
Select and explain. 
A. Dysphagia, B. Swelling on posterolateral wall, C. Toicollis, D. Caries of cervical spine is usually a common cause
D: Caries of cervical spine is usually a common cause
Answer: D: Caries of cervical spine is usually a common cause 
Explanation: M/C cause acute retropharyngeal abscess in children is suppuration of retro pharyngeal lymphnodes secondary to infection of adenoids, nasopharynx and nasal cavity. The M/C cause of acute retropharyngeal abscess in adutls is penetrating injury of posterior pharyngeal wall or cerivcal esophagus.