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
Megaloblastic anemia due to folic acid deficiency is commonly due to - 
Select and explain. 
A. Inadequate dietary intake, B. Defective intestinal absorption, C. Absence of folic acid binding protein in serum, D. Absence of glutamic acid in the intestine
A: Inadequate dietary intake
Answer: A: Inadequate dietary intake 
Explanation: None