Understanding Vitamin Solubility

Vitamins are essential nutrients our bodies need to function correctly. They are broadly classified into two groups based on how they dissolve in the body: fat-soluble and water-soluble.

• Fat-soluble vitamins dissolve in fat and can be stored in the body's fatty tissues and liver for later use. Examples include Vitamins A, D, E, and K.
• Water-soluble vitamins dissolve in water and are generally not stored in the body. Excess amounts are usually excreted in urine. Examples include the B vitamins and Vitamin C.

Analyzing the Vitamins Listed

Let's look at the solubility of each vitamin mentioned in the question:

• 1. Vitamin A: This vitamin is crucial for vision, immune function, and skin health. It is a fat-soluble vitamin.
• 2. Vitamin B6: Part of the B-complex group, Vitamin B6 is involved in metabolism and brain development. It is a water-soluble vitamin.
• 3. Vitamin C: Known for its antioxidant properties and role in immune function, Vitamin C is essential for collagen production. It is a water-soluble vitamin.
• 4. Vitamin D: Important for calcium absorption and bone health, Vitamin D is synthesized by the body upon sun exposure. It is a fat-soluble vitamin.

Identifying Fat-Soluble Vitamins

Based on the analysis above, the fat-soluble vitamins from the list are:

• Vitamin A (1)
• Vitamin D (4)

Therefore, the combination that includes only the fat-soluble vitamins from the given options is Vitamin 1 and Vitamin 4.