<prompt> A persons X-ray chest showing homogenous opacity on right side with shifting of mediastinum on opposite side. Most probable diagnosis isare:CollapsePleural effusionPneumothoraxConsolidation  <response>: Answer- B Pleural effusionPneumonectomy chest Early sip: within 24 hr: Paial filling of thorax, ipsilateral mediastinal shift diaphragmatic elevation.Homogenous opacityShift of mediastinum to the opposite sideConcave upper border Elliss curve 