Multiple choice Which of the following is the mismatched pair? Cheilosis - Riboflavin Pellagra - Niacin Scurvy - Ascorbic acid Pernicious anaemia - Pyridoxine Beriberi - Thiamine Reveal answer Fill a bubble to check yourself D Correct answer Explanation Pernicious anaemia caused when the body does not make enough red blood cells due to lack of cyanocobalamin (vitamin B12). Pyridoxine deficiency (also known as B6 deficiency) is a paediatric disease due to a lack of pyridoxine (or vitamin B6).