This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Milk, Subject name: Social & Preventive Medicine
[{'content': 'The extra calorie intake required for a lactating mother is: \nSelect and explain. \nA. 400 Kcal, B. 450Kcal, C. 500 Kcal, D. 550 Kcal', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans: D (550 Kcal) Ref: 21st edition ParkExplanation:In first 6 months of lactation, the extra calories required is 550 kcal.In next 6 months (7-12 months), the extra calories required is 400 kcal (See table below)', 'role': 'assistant'}]