‘Xanthurenic acid index’ is a reliable criterion for the deficiency of the vitamin

Q. ‘Xanthurenic acid index’ is a reliable criterion for the deficiency of the vitamin
A. Pyridoxal
B. Thiamin
C. Pantothenic acid
D. Cobalamin
Answer: Pyridoxal

A. Pyridoxal
B. Thiamin
C. Pantothenic acid
D. Cobalamin
Answer: Pyridoxal