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
Recommended Dietary allowance in pregnancy are – a)  +100–300 calb)  30 mg Iron c)  4 mg folic acidd)  2500 mg Mge)  220 μg Iodine 
Select and explain. 
A. ab, B. be, C. bc, D. ce
B: be
Answer: B: be 
Explanation: RDA in pregnancy

Energy → +350 kcal/d
iron → 35 mg/d
Folic acid → 500 ug/d
Magnesium → 310 mg/d
Iodine → 250 µg/d