which one of the following diseases is associated with a vitamin d deficiency? a. scurvy b. beriberi c. rickets d. pellagra
Pellagra is a vitamin deficiency disease most frequently caused by a chronic lack of niacin (vitamin B3 or vitamin PP, from pellagra-preventing factor) in the diet. It can be caused by decreased intake of niacin or tryptophan, and possibly by excessive intake of leucine.