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
Dose of vitamin A during pregnancy - 
Select and explain. 
A. 600 mg, B. 800 mg, C. 950 mg, D. 350 mg
B: 800 mg
Answer: B: 800 mg 
Explanation: During pregnancy recommended allowance of vitamin A is 800mcg . REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICAL 21ST EDITION. PAGE NO - 616