The vitamin which works along with para thyroid hormone is

Options

A. Vitamine C
B. Calciferol
C. Tocopherol
D. Vitamin-`B_(12)`

Answer

To answer the question regarding which vitamin works along with parathyroid hormone, we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Understanding Parathyroid Hormone (PTH)**:
- Parathyroid hormone is secreted by the parathyroid glands and plays a crucial role in regulating calcium levels in the blood.

**Hint**: Remember that PTH is primarily involved in calcium homeostasis.

2. **Function of Parathyroid Hormone**:
- PTH increases the activity of an enzyme called 1-hydroxylase. This enzyme is essential for the conversion of vitamin D into its active form.

**Hint**: Think about how hormones often activate or enhance the function of enzymes.

3. **Role of Active Vitamin D**:
- The active form of vitamin D, also known as calcitriol or calciferol, works to increase calcium absorption in the intestines and helps maintain calcium levels in the blood.

**Hint**: Consider how vitamins can have synergistic effects with hormones.

4. **Feedback Mechanism**:
- The increase in calcium levels due to the action of active vitamin D provides feedback to inhibit further release of parathyroid hormone, thus maintaining balance.

**Hint**: Feedback mechanisms are crucial in hormonal regulation; think about how the body maintains homeostasis.

5. **Identifying the Correct Vitamin**:
- Among the options given (Vitamin C, Calciferol, Tocopherol, Vitamin B12), calciferol (active vitamin D) is the one that works in conjunction with parathyroid hormone.

**Hint**: Focus on the specific functions of each vitamin mentioned in the options.

### Final Answer:
The vitamin that works along with parathyroid hormone is **Calciferol (Vitamin D)**.