Concept:The liver stores both fat-soluble and certain water-soluble vitamins, mainly A, D, B12, and small amounts of C.
Explanation:Vitamin A is stored in large amounts for vision and immunity.
Vitamin B12 (a B vitamin) is the only water-soluble vitamin significantly stored in the liver, aiding red blood cell formation and nerve function.
Vitamin C, though water-soluble, is retained in the liver for short-term use.
Vitamin D is stored in the liver and regulates calcium metabolism and bone health.
Thus, the liver stores vitamins A, B, C, and D.
Answer:Option 1: A, B, C and D vitamins.