What vitamin is neither fat nor water-soluble?

• A. Vitamin B12
• B. Choline
• C. Vitamin C
• D. Vitamin D

Answer: (B)

Vitamins are grouped by how they dissolve and are handled by the body: fat-soluble vitamins dissolve in fat and can be stored in fatty tissues and the liver, while water-soluble vitamins dissolve in water and are excreted more readily. The two solubility categories cover all true vitamins. Among the options, one is fat-soluble (the one tied to fats), and two are water-soluble (they move freely in body water and are not stored extensively). Choline, although essential, is not classified as a vitamin; it’s a nutritional essential that is water-soluble but not a vitamin. Since there isn’t a true vitamin that is neither fat- nor water-soluble, the statement doesn’t align with how vitamins are categorized. The correct takeaway is that vitamins fall into either fat- or water-soluble groups, with choline being an essential nutrient but not a vitamin.