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: Radiology
A 40 years old man presents with a recurrent hemoptysis and purulent cough. X-ray was found to be normal. The next investigation done to aid in diagnosis is – 
Select and explain. 
A. MRI, B. Bronchoscopy, C. HRCT, D. CT guided biopsy
B: Bronchoscopy
Answer: B: Bronchoscopy 
Explanation: If chest X-ray is normal in a patient with recurrent hemoptysis, next investigation of choice is Bronchoscopy.