This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition, Subject name: Medicine
[{'content': 'to reduce 1/2 kg ofbody weight over a period of one week, required caloric reduction per day is - \nSelect and explain. \nA. 125 Kcal, B. 225 Kcal, C. 500 Kcal, D. 750 Kcal', 'role': 'user'}, {'content': 'Answer: B \nExplanation: <img src=" /> Image ref - Harrison20th edition pg 89', 'role': 'assistant'}]