<prompt> A 40 years old man presents with a recurrent hemoptysis and purulent cough. X-ray was found to be normal. To next investigation done to aid in diagnosis is :MRIBronchoscopyHRCTCT guided biopsy  <response>: B i.e. Bronchoscopy As a rule, you can remember, for almost all cases of hemoptysis the investigation of choice is Bronchoscopy followed by HRCT; Except for hemoptysis associated with parenchymal interstitial lung disease where investigatim of choice is HRCT Bronchoscopy, and in suspected bronchitis where you observe and wait for recurrence for performing Bronchoscopy. 