All are involved in energy metabolism except ?

Ans. is 'd' i.e., Vitamin B12 The active forms of five of the B Vitamins paicipate in the release of energy from carbohydrate, fat and proteins. These five vitamins of Vitamin B group which are involved in energy metabolism are :-Thiamin (Vitamin BI)Riboflavin (Vitamin B2)Niacin (Vitamin B3)Pantothenic acid (Vitamin B5 )Biotin (Vitamin B7 or Vitamin H)