Answer:
Thiamin deficiency - Beri-beri, polyneuritis, and Wernicke-Korsakoff syndrome.
Riboflavin deficiecy - cheilosis, angular stomatitis, and dermatitis.
Niacin deficiency - Pellagra (with diarrhea, dermatitis, and dementia)
Explanation:
Thiamin, riboflavin, and niacin belong to a group of vitamins known as the B-complex vitamins. The three substances are known to function as co-enzyme in different processes within the body and hence, their deificiency has several implications.
Thiamin deficiency is known to cause Beri-beri, polyneuritis, and Wernicke-Korsakoff syndrome.
Riboflavin deficiecy is known to cause cheilosis, angular stomatitis, and dermatitis.
Niacin deficiency is known to cause Pellagra with diarrhoea, dermatitis, and dementia
