18. Which of the following descriptions about vitamins is NOT correct? (A) They are generally classified into fat soluble or water soluble (B) Some of them are required as coenzymes to facilitate enzymatic catalysis. (C)Vitamin B1 is found naturally in meats, fish, and whole grains. (D) Vitamin B12 is naturally present in vegetables like carrot and broccoli. (E) Vitamin E is chemically known as a-tocopherol and enriched in seeds and