This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gastro Intestinal System, Subject name: Pediatrics
[{'content': 'A 6-year-old drowsy child came in emergency with history of vomiting, loose motion for 3 days. On examination he had sunken eyes, hypothermia, skin on pinching was taking 5 seconds to revert. What is your diagnosis? \nSelect and explain. \nA. No dehydration, B. Mild dehydration, C. Some dehydration, D. Severe dehydration', 'role': 'user'}, {'content': 'Answer: D \nExplanation: d. Severe dehydration(Ref: Nelson\'s 20/e p 1854-1874)In this case, sunken eyes and skin "goes back very slowly" (in 5 seconds) in a "lethargic" (drowsy) child, so it is a case of severe dehydration.', 'role': 'assistant'}]