This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mechanical injuries, Subject name: Forensic Medicine
Commonest organ to be injured in primary blast injuries is - 
Select and explain. 
A. Lung, B. Liver, C. Spleen, D. Skin
A: Lung
Answer: A: Lung 
Explanation: The synopsis of forensic medicine & toxicology ; Dr k.s narayan reddy ;28th edition ;pg.no. 138 . Lungs show sub pleural patchy hemorrhage in the ear ,often in the line of ribs ,rupture of alveolar septa & bullae at the margins .Desquamated alveolar & bronchial epithelium is seen lying free. This causes reactive pulmonary edema & blood stained froth is found in air passages & later bronchopneumonia .this is called blast lung .