Home » Which of the following diseases is caused by the deficiency of Niacin? Vitamins MCQs Which of the following diseases is caused by the deficiency of Niacin? January 26, 2022 8 Views Q. Which of the following diseases is caused by the deficiency of Niacin? A. Scurvy B. Rickets C. Pellagra D. Pernicious anaemia Answer: Pellagra.