Which of the following is a protein deficient disease?

Options

A. Osteomalacia
B. Kwashiorkor
C. Pellagra
D. Rickets

Answer

To determine which of the following is a protein-deficient disease, we will analyze each option provided:

1. **Osteomalacia**: This condition is characterized by the softening of bones, which leads to an increased risk of fractures. Osteomalacia is primarily caused by a deficiency of vitamin D, not protein. Therefore, this option is incorrect.

2. **Kwashiorkor**: This is a well-known protein deficiency disease that occurs when there is inadequate protein intake in the diet, often seen in regions where food resources are limited. Symptoms of Kwashiorkor include edema, irritability, and growth failure in children. Thus, this option is correct.

3. **Pellagra**: Pellagra is a disease caused by a deficiency of niacin (vitamin B3) and is characterized by symptoms such as dermatitis, diarrhea, and dementia. Since it is not related to protein deficiency, this option is incorrect.

4. **Rickets**: Rickets is a disease that results from a deficiency of vitamin D, calcium, or phosphate, leading to weakened bones in children. Like osteomalacia, it is not caused by protein deficiency, making this option incorrect.

Based on the analysis, the correct answer to the question "Which of the following is a protein deficient disease?" is **Kwashiorkor**.

### Summary of Steps:
1. Analyze Osteomalacia - caused by vitamin D deficiency (incorrect).
2. Analyze Kwashiorkor - caused by protein deficiency (correct).
3. Analyze Pellagra - caused by niacin deficiency (incorrect).
4. Analyze Rickets - caused by vitamin D deficiency (incorrect).
5. Conclude that Kwashiorkor is the protein-deficient disease.