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: Gynaecology & Obstetrics
The following statements are related to the therapy of iron deficiency anaemia except: 
Select and explain. 
A. Oral iron can be given only if anemia is detected before 20 weeks of pregnancy, B. Parenteral iron therapy markedly increases the reticulocytic count within 7-14 days, C. Parenteral therapy is ideal during 30-36 weeks, D. Blood transfusion may be useful in severe anaemia beyond 36 weeks
A: Oral iron can be given only if anemia is detected before 20 weeks of pregnancy
Answer: A: Oral iron can be given only if anemia is detected before 20 weeks of pregnancy 
Explanation: Overview of Management of Iron Deficiency Anemia in Pregnancy: