Select the incorrect statement .

Options

A. STDs are reported to be very high among persons in the age group in the age group of 15-24 years.
B. MTP has a significant role in decreasing the population though it is not meant for that purpose.
C. Females infected with STD may often be asymptomatic and hence, may remain undetected for long.
D. The reasons for infertility cannot be immunological.

Answer

To solve the question, we need to analyze each of the provided statements and determine which one is incorrect.

### Step-by-Step Solution:

1. **Analyze Statement 1**:
- "STDs, sexually transmitted diseases are reported to be very high among persons in the age group of 15 to 24 years."
- This statement is **correct**. Research shows that individuals in this age group are indeed at a higher risk for STDs due to various behavioral and biological factors.

2. **Analyze Statement 2**:
- "MTP, medical termination of pregnancy, has a significant role in decreasing the population, though it is not meant for that purpose."
- This statement is also **correct**. While MTP is primarily intended for health reasons and complications during pregnancy, it can contribute to population control indirectly.

3. **Analyze Statement 3**:
- "Females infected with sexually transmitted diseases may often be asymptomatic and hence may remain undetected for long."
- This statement is **correct**. Many women with STDs do not exhibit symptoms, which can lead to prolonged undiagnosed infections.

4. **Analyze Statement 4**:
- "The reason for infertility cannot be immunological."
- This statement is **incorrect**. Infertility can indeed have immunological causes, among other factors. Therefore, this statement does not hold true.

### Conclusion:
The incorrect statement is: **"The reason for infertility cannot be immunological."**