State symptoms of fat-soluble vitamin deficiency.

1. Vitamin A deficiency: night blindness, dry skin, increased susceptibility to infections, impaired growth and development in children
2. Vitamin D deficiency: bone pain, muscle weakness, increased risk of fractures, rickets in children
3. Vitamin E deficiency: muscle weakness, vision problems, impaired immune function
4. Vitamin K deficiency: excessive bleeding or bruising, impaired blood clotting

Vitamin A Deficiency
- Night blindness
- Dry eyes
- Xerophthalmia (severe corneal dryness)
- Impaired immune function
- Follicular hyperkeratosis (rough, dry skin)

Vitamin D Deficiency
- Rickets in children (deformities in bones and teeth)
- Osteomalacia in adults (bone pain and weakness)
- Muscle weakness
- Fatigue

Vitamin E Deficiency
- Anemia
- Peripheral neuropathy
- Muscle weakness
- Impaired immune function

Vitamin K Deficiency
- Increased bleeding tendency
- Easy bruising
- Blood in urine or stool