Which vitamin is not fat-soluble among the following options?

• A. Vitamin A
• B. Vitamin B
• C. Vitamin D
• D. Vitamin E

Answer: (B)

Fat-soluble vitamins require fat for absorption and tend to be stored in the liver and body fat, so they can accumulate with excess intake. The ones listed as fat-soluble are Vitamin A, Vitamin D, and Vitamin E. Vitamin B, on the other hand, refers to a group of water-soluble vitamins, which are not stored in large amounts and are excreted in urine when consumed in excess, so they must be consumed more regularly. Therefore, the vitamin that is not fat-soluble among these options is Vitamin B.