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: Biochemistry
A 35 year old female patient presents to the clinic for routine  general checkup. Patient is 4 months pregnant. Routine blood investigations reveal Hb levels 11gm/dl. The recommended dietary allowance for iron in this patient is: 
Select and explain. 
A. 40-50mg, B. 20-25mg, C. 15-20mg, D. 10-15mg
A: 40-50mg
Answer: A: 40-50mg 
Explanation: None