Biochemistry Female, on maize as a staple diet. History of diarrhoea and lesion in the neck region. It is due to the deficiency of? A Niacin B Zinc C Thiamine D Pyridoxine 💡 Explanation Female, on maize as a staple diet. History of diarrhoea and lesion in the neck region. It is due to the deficiency of? ✓ Correct Answer: A. Niacin