This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Anatomy
Rampal 45 yr old man present with history of recurrent haemoptysis and purulent sputum.his chest X-RAY is normal, which of the following will be the next best investigation for him.? 
Select and explain. 
A. HRCT, B. CT guided angiography, C. Angiography, D. Spiral CT
A: HRCT
Answer: A: HRCT 
Explanation: Presence of purulent sputum with recurrent haemoptysis suggests a diagnosis of bronchiectasis. HRCT .is now the diagnostic procedure of choice having repalced bronchiography Ref Harrison 19th edition pg 1710