Which gland of human body is known as the master gland?

Options

A. Pancreas
B. Splee
C. Liver
D. Pituitary

Explanation

### Step-by-Step Solution:

1. **Identify the Question**: The question asks which gland in the human body is known as the master gland.

2. **Consider the Options**: The options given include pancreas, spleen, liver, and pituitary gland.

3. **Analyze Each Option**:
- **Pancreas**: It produces two hormones, insulin and glucagon, which regulate blood sugar levels. However, it does not control other glands, so it cannot be considered the master gland.
- **Spleen**: Its primary function is to filter blood and produce red blood cells. It does not regulate other glands, so it is not the master gland.
- **Liver**: The liver produces bile and is involved in metabolism, but it does not control other endocrine glands, thus it is not the master gland.
- **Pituitary Gland**: This gland is responsible for releasing hormones that regulate various bodily functions and control other endocrine glands. It plays a crucial role in growth, metabolism, and sexual maturation.

4. **Conclusion**: Based on the analysis, the pituitary gland is known as the master gland of the human body because it regulates the functions of other endocrine glands.

5. **Final Answer**: The master gland of the human body is the **pituitary gland**.