Large Amounts of Folic Acid Can Mask a Vitamin B₁₂

Large amounts of folic acid can mask a vitamin B₁₂ deficiency and prevent ____ from resulting.Over time,the symptoms unique to a vitamin B₁₂ deficiency will occur,and these are related to the ____.

A) microcytic anemia; muscular system
B) DNA and RNA synthesis; vascular system
C) one-carbon transfer; nervous system
D) macrocytic anemia; nervous system