A person is having problems with calcium and phosphorus metabolism in his body. Which one of the following glands may not be functioning properly?

Options

A. Thyroid gland.
B. Pineal gland.
C. Parathyroid gland.
D. Pancreas

Explanation

To determine which gland may not be functioning properly in a person experiencing problems with calcium and phosphorus metabolism, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of Hormones in Calcium and Phosphorus Metabolism**:
- Calcium and phosphorus metabolism is crucial for various bodily functions, including bone health and cellular processes.

2. **Identify Key Hormones**:
...