Which is sex linked disease in man

Options

A. Polia
B. Alzheimer 's disease
C. Haemophilia
D. Beri-beri.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a sex-linked disease in men. Sex-linked diseases are those that are associated with genes located on the sex chromosomes, particularly the X chromosome.

2. **Identifying Options**: The options provided include various diseases. We need to analyze each one to determine if it is sex-linked.

3. **Analyzing Polio**: Polio is caused by a viral infection (polio virus). It is not a genetic disorder, so it cannot be a sex-linked disease.

4. **Analyzing Alzheimer's Disease**: Alzheimer's disease is a neurodegenerative disorder and is not classified as a genetic disorder linked to sex chromosomes. Therefore, it is not a sex-linked disease.

5. **Analyzing Hemophilia**: Hemophilia is a genetic disorder that affects blood clotting. It is caused by a deficiency in clotting factors and is inherited in a sex-linked recessive manner, primarily affecting males who have only one X chromosome.

6. **Analyzing Beriberi**: Beriberi is caused by a deficiency of vitamin B and is not a genetic disorder. Thus, it is not a sex-linked disease.

7. **Conclusion**: Based on the analysis, the only option that qualifies as a sex-linked disease in men is hemophilia. Therefore, the correct answer is hemophilia.

**Final Answer**: Hemophilia is a sex-linked disease in man.

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