This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Gastrointestinal System Including Diarrhea, Subject name: Pediatrics
[{'content': 'Amount of ORS given in a 4 kg child with diarrhea with some dehydration: \nSelect and explain. \nA. 200 mL, B. 300 mL, C. 400 mL, D. 800 mL', 'role': 'user'}, {'content': 'Answer: B \nExplanation: For some dehydration, amount of ORS given is 75 ml/kg = 75 x 4 = 300 ml, over 4 hours', 'role': 'assistant'}]