Hormones secreted by endocrine glands can have same or different types of action.find out the pair of hormones are not antagonistic (having opposite effects) to each other

Options

A. Insulin , Glucagon
B. Aldosterone , Atrial Natriuretic Factor
C. Relaxin , Inhibin
D. Parathormone , Calcitonin

Explanation

To solve the question of identifying pairs of hormones that are not antagonistic to each other, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Antagonistic Hormones**: Antagonistic hormones are those that have opposite effects on the same physiological function. For example, insulin lowers blood glucose levels while glucagon raises them.

2. **Identify Hormone Pairs**: We need to analyze different pairs of hormones to determine if they are antagonistic or not.

3. **Examine the Given Hormones**:
- **Insulin and Glucagon**: Insulin decreases blood glucose levels (hypoglycemic effect), while glucagon increases blood glucose levels (hyperglycemic effect). These are antagonistic.
- **Aldosterone and Atrial Natriuretic Factor (ANF)**: Aldosterone increases sodium reabsorption and blood volume, while ANF promotes sodium excretion and decreases blood volume. These are also antagonistic.
- **Relaxin and Inhibin**: Relaxin helps in relaxing uterine ligaments during pregnancy, while inhibin inhibits FSH synthesis from the pituitary gland. These hormones have different functions and do not oppose each other, thus they are not antagonistic.
- **Parathyroid Hormone (PTH) and Calcitonin**: PTH increases blood calcium levels, whereas calcitonin decreases blood calcium levels. These are antagonistic.

4. **Conclusion**: After analyzing the pairs, the only pair that is not antagonistic is **Relaxin and Inhibin**.

### Final Answer:
The pair of hormones that are not antagonistic to each other is **Relaxin and Inhibin**.

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