This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, Subject name: Social & Preventive Medicine
The daily extra calorie requirement in first trimester of pregnancy is - 
Select and explain. 
A. 50, B. 150, C. 350, D. 450
C: 350
Answer: C: 350 
Explanation: For pregnant woman the extra energy requirement is 350kcal.REF.PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE.Editon-21.Page no.-588 table no.29.