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
Antral sign is seen in - 
Select and explain. 
A. Juvenile angiofibroma, B. Otosclerosis, C. CSOM, D. Sinusitis
A: Juvenile angiofibroma
Answer: A: Juvenile angiofibroma 
Explanation: Antral sign or Holman-Miller sign (anterior bowing of posterior wall of maxillary sinus) on CT scan is pathognomic of JNA.