<prompt> Best investigation for Bronchiectasis is?Chest X RayMRIPulmonary Function TestsHRCT  <response>: ANSWER: D HRCTREF: Harrisons Internal Medicine 17th edition chapter 252Though the chest radiograph is important in the evaluation of suspected bronchiectasis, the findings are often nonspecific. CT, especially with high-resolution images 1.0-1.5 mm thick, provides an excellent view of dilated airways. Consequently, it is now the standard technique for detecting or confirming the diagnosis of bronchiectasis. 