Home ยป Which of the following nutrient deficiency causes megaloblastic anaemia? Vitamins MCQs Which of the following nutrient deficiency causes megaloblastic anaemia? January 26, 2022 19 Views Q. Which of the following nutrient deficiency causes megaloblastic anaemia? A. Folic acid B. Niacin C. Pyridoxine D. Cobalamin Answer: Folic acid.