List of top Biochemistry Questions on Vitamins asked in GPAT

Which one of the following diseases is caused by the deficiency of niacin:
Which one of the following diseases is caused by the deficiency of niacin:
Most common type of megaloblastic anemia caused by malabsorption of vitamin B12 and characterized by decreased production of hydrochloric acid in the stomach and a deficiency of intrinsic factor is
Absorption of Vitmain B12 is facilitated by
Riboflavin, chemically is:
Vitamin K is constituted of_______ring.