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
Investigation of choice for nasopharyngeal angiofibroma ? 
Select and explain. 
A. X-ray, B. MRI, C. Plane-CT, D. CT- contrast
D: CT- contrast
Answer: D: CT- contrast 
Explanation: Ans. is 'd' i.e., CT contrast Investigations of JNA Following investigations are used in JNA :? Soft tissue lateral film of nasopharynx :- shows soft tissue mass in the nasopharynx. X-rays paranasal sinus and base of skull :- findings have been explained in previous explanation. CT scan of head with contrast :- is the investigation of choice. It shows the extent of tumour, bony destruction, or displacement. Anterior bowing of the posterior wall of maxillary sinus (antral sign or Holman-Miller sign) is pathgnomic of JNA. MRI complementory to CT when soft tissue extensions are present intracranially, in infratemporal foss or in orbit. Carotid angiography :- shows extension of tumor, its vascularity and feeding vessels. Biopsy should be avoided as it can cause severe bleeding.