പെല്ലഗ്ര പ്രതിരോധ ഘടകംARiboflavinBPantothenic acidCNiacinDPyridoxineAnswer: C. Niacin Read Explanation: The pellagra preventive factor is niacin, also known as vitamin B3. Niacin is crucial for preventing and treating pellagra, a disease caused by a deficiency of niacin or its precursor, tryptophan.Read more in App