Which one of the following is responsible for mental abnormalites in humans?

Options

A. XXX and XY
B. XX and XXX
C. XO and XXX
D. XX and XO

Answer

To answer the question "Which one of the following is responsible for mental abnormalities in humans?" we will analyze the given options and the associated syndromes.

### Step-by-Step Solution:

1. **Understanding the Options**: The options provided are:
- A) XXS and XY
- B) XX and XXX
- C) XO and XXX
- D) XX and XO

2. **Identifying the Chromosomal Abnormalities**:
- **XXS and XY**: This option is not standard; it seems to be a typographical error or misrepresentation.
- **XX and XXX**:
- **XX**: Normal female chromosome pair.
- **XXX**: This is known as Triple X syndrome, which can lead to some developmental delays and learning disabilities but is not primarily associated with severe mental abnormalities.
- **XO and XXX**:
- **XO**: This refers to Turner syndrome, which affects females and can lead to various health issues, including some mental health challenges.
- **XXX**: As mentioned, it can lead to developmental delays.
- **XX and XO**:
- **XX**: Normal female chromosome pair.
- **XO**: Turner syndrome, which can cause mental health issues.

3. **Analyzing the Impact of Each Syndrome**:
- **Turner Syndrome (XO)**: Girls with Turner syndrome may have difficulties in social situations and are at an increased risk for Attention Deficit Hyperactivity Disorder (ADHD).
- **Triple X Syndrome (XXX)**: Girls with this syndrome may experience developmental delays and learning disabilities.

4. **Conclusion**: The combination of XO (Turner syndrome) and XXX (Triple X syndrome) is associated with mental abnormalities. Therefore, the correct answer is **C) XO and XXX**.

### Final Answer:
The correct option is **C) XO and XXX**.