Excess of avidin causes deficiency of:: (A) Folate, (B) Choline, (C) Vitamin B12, (D) Biotin
Answer is D. Excess consumption of raw eggs, which contains a protein 'avidin' - a biotin binding protein leads to biotin deficiency When cooked, avidin is paially denatured and its binding to biotin is reduced. So cooked egg whites are safe to consume.