Which of the following takes part in salt balancing? 

Options

A. Mineralocorticoid
B. Glucocorticoid
C. Somatotrophin
D. None

Answer

To determine which of the following takes part in salt balancing, let's analyze each option provided:

1. **Mineralocorticoid**:
- Mineralocorticoids are hormones produced by the adrenal cortex.
- Their primary function is to regulate electrolyte balance, particularly sodium and potassium levels in the body.
- They help in maintaining blood pressure and fluid balance by promoting sodium retention and potassium excretion in the kidneys.

2. **Glucocorticoid**:
- Glucocorticoids are also secreted by the adrenal cortex.
- Their main role is to regulate carbohydrate metabolism, influencing the formation and storage of glycogen.
- While they do have some effect on sodium and water reabsorption in the kidneys, their primary function is not related to salt balance.

3. **Somatotropin**:
- Somatotropin, also known as growth hormone (GH), is secreted by the anterior lobe of the pituitary gland.
- Its main function is to stimulate growth and cell reproduction.
- It does not play a direct role in salt balancing.

4. **None of these**:
- This option suggests that none of the listed hormones are involved in salt balancing, which is not accurate.

Based on the analysis, the hormone that takes part in salt balancing is **Mineralocorticoid**.

### Final Answer:
**Mineralocorticoid** takes part in salt balancing.