Which of the following hormones is correctly matched with its deficiency disease ?

Options

A. Parathormone - Tetany
B. Relaxin - Cretinism
C. Insulin - Diabetes insipidus
D. Prolactin - Astigmatism

Answer

To determine which hormone is correctly matched with its deficiency disease, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Parathormone and Tetany**:
- Parathormone (also known as parathyroid hormone) regulates calcium levels in the blood.
- A deficiency in parathormone leads to low calcium levels (hypocalcemia), which can cause tetany, characterized by muscle spasms and increased excitability of nerves.
- **Conclusion**: This match is correct.

2. **Analyzing Relaxin and Creatinism**:
- Relaxin is a hormone primarily involved in childbirth and does not play a role in thyroid function.
- Creatinism (or cretinism) is caused by a deficiency of thyroid hormones, leading to stunted physical and mental development.
- **Conclusion**: This match is incorrect.

3. **Evaluating Insulin and Diabetes Insipidus**:
- Insulin is a hormone that regulates blood glucose levels.
- Diabetes insipidus is caused by a deficiency of antidiuretic hormone (ADH), not insulin. It results in excessive thirst and urination.
- **Conclusion**: This match is incorrect.

4. **Examining Prolactin and Astigmatism**:
- Prolactin is a hormone associated with lactation and has no direct connection to eye conditions.
- Astigmatism is a refractive error caused by an irregular curvature of the cornea or lens, unrelated to hormonal levels.
- **Conclusion**: This match is incorrect.

5. **Final Answer**:
- The only correct match is **Option A: Parathormone - Tetany**.

### Final Answer:
**Option A: Parathormone - Tetany**

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