Dwarfism is a hormonal disorder due to

Options

A. Deficiency of thyroxine secreted by the thyroid
B. Excess of thyroxine
C. Deficiency of STH produced by the pituitary
D. Deficiency of thyroxine and GH.

Answer

**Step-by-Step Solution:**

1. **Understanding Dwarfism**: Dwarfism is a condition characterized by short stature, and it can be caused by various factors, including genetic and hormonal influences.

2. **Identifying the Hormone Involved**: The specific type of dwarfism we are discussing is pituitary dwarfism, which is related to the functioning of the pituitary gland.

3. **Role of the Pituitary Gland**: The pituitary gland is responsible for the secretion of several hormones, one of which is the growth hormone (GH), also known as somatotropin (STH).

4. **Effects of Growth Hormone Deficiency**: A deficiency in growth hormone leads to inadequate stimulation of growth in bones and tissues, resulting in stunted growth and decreased height, which is characteristic of dwarfism.

5. **Differentiating from Other Hormonal Disorders**: Other hormonal deficiencies, such as thyroxine from the thyroid gland, lead to different conditions (e.g., goiter or cretinism) and are not responsible for dwarfism.

6. **Conclusion**: Therefore, the correct answer to the question is that dwarfism is a hormonal disorder due to a deficiency of growth hormone (GH).

**Final Answer**: Dwarfism is a hormonal disorder due to a deficiency of growth hormone (GH).

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