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 chronic smoker presents with complaints of haemoptysis. Chest X-ray appears to be normal. What is the next best investigation? 
Select and explain. 
A. Bronchoscopy, B. High resolution CT, C. Sputum cytology, D. Bronchoalveolar lavage
A: Bronchoscopy
Answer: A: Bronchoscopy 
Explanation: Ans. Bronchoscopy