Which of the following is a hypercalcemic hormone ?

Options

A. Thyroxine
B. Parathyroid hormone
C. Insulin
D. Glucagon

Answer

To determine which of the following is a hypercalcemic hormone, we need to understand the definition and function of hypercalcemic hormones.

### Step-by-step Solution:

1. **Understand Hypercalcemic Hormones**:
- Hypercalcemic hormones are those that increase the concentration of calcium in the blood.

2. **Identify the Options**:
- The options given are:
- A) Thyroxine
- B) Parathyroid hormone
- C) Insulin
- D) Glucagon

3. **Analyze Each Option**:
- **Thyroxine**: This hormone primarily regulates the basal metabolic rate and does not play a significant role in calcium regulation. Therefore, it is not a hypercalcemic hormone.
- **Parathyroid Hormone (PTH)**: This hormone is secreted by the parathyroid glands and is known to increase calcium levels in the blood. Thus, it is a hypercalcemic hormone.
- **Insulin**: This hormone regulates glucose levels in the blood and does not influence calcium levels, making it incorrect.
- **Glucagon**: Similar to insulin, glucagon also regulates blood glucose levels and does not affect calcium levels, thus it is also incorrect.

4. **Conclusion**:
- Based on the analysis, the only hormone that increases calcium levels in the blood is the **Parathyroid Hormone**. Therefore, the correct answer is **B) Parathyroid hormone**.