Unknown General 1a32342d Retro pharyngeal space extends up to which of the following level? A Base of skull to C6 vertebra B Base of skull to bifurcation of trachea C Base of skull to the level of diaphragm D Base of skull to cricoid cartilage High-Yield Explanation (Refer: P. L. Dhingra’s Diseases of Ear, Nose and Throat & Head and Neck Surgery, 6th edition, pg no: 265)