A 10-year-old boy presents with nasal obstruction and intermittent profuse epistaxis. He has a firm pinkish mass in the nasopharynx. All of the following investigations are done in this case except-
Biopsy can cause profuse bleeding, therefore should be avoided.
Investigations used for NFA are :-


Soft tissue lateral film of nasopharynx
X-ray paranasal sinus and base of skull
Contrast CT of skull (investigation of choice)
MRI
Carotid angiography
X - ray base of skull
Carotid angiography
CT scan
Biopsy