Select the intrinsic disease causing factor among the following.

Options

A. Microorganisms
B. Environmental pollutants
C. Abnormal hormone secretion
D. Inadequate diet

Explanation

To solve the question of selecting the intrinsic disease-causing factor from the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Intrinsic Factors**: These are disease-causing factors that originate from within the body.
- **Extrinsic Factors**: These are disease-causing factors that come from outside the body.

2. **Analyze the Given Options**:
- **Option 1: Microorganism**: Microorganisms are external agents (like bacteria, viruses) that cause diseases. Therefore, this is an extrinsic factor.
- **Option 2: Environmental Pollutant**: Environmental pollutants (like chemicals in the air or water) are also external factors. Hence, this is an extrinsic factor.
- **Option 3: Abnormal Hormone Secretion**: Hormones are produced within the body. If there is an abnormal secretion, it is a factor that arises from within the body, making it an intrinsic factor.
- **Option 4: Inadequate Diet**: A diet is an external factor since it relates to what a person consumes. Thus, this is also an extrinsic factor.

3. **Identify the Correct Answer**:
- From the analysis, the only option that is an intrinsic disease-causing factor is **Option 3: Abnormal Hormone Secretion**.

### Final Answer:
The intrinsic disease-causing factor among the given options is **Abnormal Hormone Secretion**.

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