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
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- 
Select and explain. 
A. X - ray base of skull, B. Carotid angiography, C. CT scan, D. Biopsy
D: Biopsy
Answer: D: Biopsy 
Explanation: 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