A 26yrs old asymptomatic lady patient has MCV-70,ferritin - 100g/L, Hb-10gm%.Most possible cause is:

A 26yrs old asymptomatic lady patient has MCV-70,ferritin - 100g/L, Hb

1.	A 26yrs old asymptomatic lady patient has MCV-70,ferritin - 100g/L, Hb-10gm%.Most possible cause is:
A.	Folate deficiency
B.	Iron deficiency
C.	Thalassemia trait
D.	B12 deficiency
Answer» D. B12 deficiency