This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
[{'content': 'Volume of blood in a child, per kg of body weight \nSelect and explain. \nA. 60-70 ml, B. 100-150 ml, C. 150-200 ml, D. 200-250 ml', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Newborn baby weighing between 5 and 8 lbs. (2.3 to 3.6 kg) has only about 1 cup (0.2 liters) of blood in their body. therefore approximately per kg of body weight, it comes around 60-70kg.', 'role': 'assistant'}]