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
A 24 years old primigravida wt = 57 kg, Hb 11,0 gm% visits an antenatal clinic during 2nd trimester of pregnancy seeking advice on dietary intake. She should be advised - 
Select and explain. 
A. Additional intake of 300 K.cal, B. Additional intake of 500 K.cal, C. Additional intake of 650 K.cal, D. None
D: None
Answer: D: None 
Explanation: Ans. is 'None' o Females have increased energy requirments during vulnerable periods such as lactation & pregnancy.