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