<prompt> Which of the following is not true about Acute Retropharyngeal abscess?Dysphonia is common symptomUsually swelling is seen on posterolateral wall of pharynxToicollis is not uncommonCaries of cervical spine is usually a common cause  <response>: Caries of cervical spine is usually a common cause of chronic retropharyngeal abscess. Ref : ENT textbook by Dhingra 6th edition Pgno : 394-395 