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 Pediatric age group, the most common feature of polytrauma is \nSelect and explain. \nA. Hypothermia, B. Hypotension, C. Hypovelomic shock, D. Hypoxemia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: As the surface area to body volume ratio of children is high, thermal energy loss is higher and hypothermia is a higher risk. Due to the greater physiological capacity and ability of children to compensate for the fluid loss, hypotension is a very late and ominous sign of hypovolaemic shock.', 'role': 'assistant'}]