<prompt> Diagnosis is:Right pneumothoraxLeft pneumothoraxRight hydropneumothoraxLeft hydropneumothorax  <response>: Ans. C Right hydropneumothoraxCXR shows lucent black lateral aspect of right hemithorax with air fluid level in it-so hydropneumothorax. An expiratory CXR better than an inspiratory CXR for a diagnosis of pneumothorax. CT Thorax is IOC for pneumohydro- pneumothorax. 