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: Medicine
Which one of the following is not true of folic acid 
Select and explain. 
A. It prevents megaloblastic anaemia, B. Its deficiency is detected by Schilling test, C. Its administration should be started in early pregnancy, D. Its deficiency causes neural tube defect in foetus
B: Its deficiency is detected by Schilling test
Answer: B: Its deficiency is detected by Schilling test 
Explanation: None