Which of the following pairs correctly matches a hormone with the disease resulting from its deficiency ?

Options

A. Thyroxine - Tetany
B. Parathyroid - Diabetes mellitus
C. Luteinizing hormone - Failure of ovulation
D. Insuline - Diabetes insipidus

Answer

To solve the question regarding which hormone correctly matches with the disease resulting from its deficiency, we can analyze each option step by step.

### Step-by-Step Solution:

1. **Understand the Question**: We need to identify which pair of hormone and disease is correctly matched based on the deficiency of the hormone.

2. **Analyze Option A**:
- **Hormone**: Thyroxine
- **Disease**: Tetanus
- **Analysis**: Tetanus is not caused by a deficiency of thyroxine. Tetanus is related to the bacteria *Clostridium tetani* and is associated with low calcium levels, which are regulated by parathormone.
- **Conclusion**: This pair is incorrect.

3. **Analyze Option B**:
- **Hormone**: Parathyroid hormone
- **Disease**: Diabetes mellitus
- **Analysis**: Diabetes mellitus is primarily caused by a deficiency of insulin, not parathyroid hormone. Parathyroid hormone regulates calcium levels in the blood.
- **Conclusion**: This pair is incorrect.

4. **Analyze Option C**:
- **Hormone**: Luteinizing hormone (LH)
- **Disease**: Failure of ovulation
- **Analysis**: Luteinizing hormone is crucial for ovulation. A deficiency in LH can lead to failure of ovulation, making this pair a correct match.
- **Conclusion**: This pair is correct.

5. **Analyze Option D**:
- **Hormone**: Insulin
- **Disease**: Diabetes insipidus
- **Analysis**: Diabetes insipidus is caused by a deficiency of antidiuretic hormone (ADH), not insulin. Insulin deficiency leads to diabetes mellitus.
- **Conclusion**: This pair is incorrect.

6. **Final Conclusion**: After analyzing all the options, the only correct match is:
- **Correct Pair**: Luteinizing hormone and failure of ovulation (Option C).

### Final Answer:
The correct answer is **Option C: Luteinizing hormone - Failure of ovulation**.

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