Explanation:

- Beriberi is caused by a deficiency of Vitamin B. Specifically, it's linked with a lack of Vitamin B1, also known as thiamine. This leads to issues such as weakness and heart problems.

- Option 1: Vitamin A is crucial for vision, immune function, and skin health. Deficiency can lead to night blindness but not beriberi.

- Option 2: Vitamin K is important for blood clotting. Its deficiency can cause bleeding and bruising problems but not beriberi.

- Option 4: Vitamin C is essential for the health of the skin and connective tissues. A lack of it leads to scurvy, not beriberi.