Explanation:

- Vitamin B-12 (Option 1): This is a water-soluble vitamin that can be stored in the liver for several years. It plays a critical role in brain function and red blood cell formation. This is correct.

- Vitamin C (Option 2): This vitamin is crucial for the growth and repair of tissues but cannot be stored in the body for long periods. You need a regular intake.

- Vitamin K (Option 3): It's a fat-soluble vitamin pivotal for blood clotting and bone health, stored in fat tissues, not the liver in water-soluble form.

- Vitamin D (Option 4): This is also fat-soluble, essential for calcium absorption and bone health. It's stored in body fat.