In pyridoxine deficiency, tryptophan is converted to -: (A) Nicotine, (B) Acetoacetate, (C) Xantheurenic acid, (D) Acetyl CoA
Answer is C. Ans. is 'c' i.e., Xantheurenic acid o In vitamin B6 deficiency the metabolism is shuted to xanthurenic acid. Therefore, xantheurenic acid excretion is increased in urine.