This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
The daily extra calorie requirement in a normal pregnancy is: 
Select and explain. 
A. 50, B. 150, C. 450, D. 300
D: 300
Answer: D: 300 
Explanation: The energy requirements of women are increased by pregnancy (+300 kcal daily throughout pregnancy) and lactation (+550 kcal daily during the first 6 months, and +400 kcals daily during the next 6 months) over and above their normal requirements. Ref: Textbook of Preventive and Social Medicine by K Park, 19th edition, Page 502.