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
The extra calorie intake required for a lactating mother is: 
Select and explain. 
A. 400 Kcal, B. 450Kcal, C. 500 Kcal, D. 550 Kcal
D: 550 Kcal
Answer: D: 550 Kcal 
Explanation: 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)