This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Trauma, Subject name: Surgery
[{'content': 'In a blast injury , which of the following organ is least involved \nSelect and explain. \nA. Lungs, B. Eardrum, C. Liver, D. GI tract', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Primary blast injuries result from the rapid overpressure or shock waves produced by an explosion* These injuries result from the dramatic changes in barometric pressure projected from the point of detonation* Primary blast injuries predominantly cause damage to air filled hollow organs of the body from rapid pressure change (barotraumas).\\ * Damage to air filled organs includes middle ear, lungs and GIT. * Most sensitive and most frequently injured hollow organ: Tympanic membrane > Lungs* Blast damage to the lungs is the MC cause of life threatening injury following an explosion.', 'role': 'assistant'}]