Which one of the following is sex-linked disease?

Options

A. Haemophilia
B. Down's syndrome
C. Albinism
D. Turner's syndrome

Answer

To determine which of the diseases listed is a sex-linked disease, we need to understand what sex-linked diseases are and identify the options provided.

### Step-by-Step Solution:

1. **Understand the Concept of Sex-Linked Diseases**:
- Sex-linked diseases are genetic disorders that are associated with genes located on the sex chromosomes (X or Y). Most sex-linked diseases are X-linked, meaning they are carried on the X chromosome.

2. **Identify Common Sex-Linked Diseases**:
- Some common examples of sex-linked diseases include:
- Hemophilia
- Color blindness
- Duchenne muscular dystrophy

3. **Analyze the Options Provided**:
- In the question, we need to evaluate the diseases listed (though the specific options are not provided in the transcript). However, we know that hemophilia is a well-known sex-linked disease.

4. **Conclusion**:
- Based on the understanding that hemophilia is a sex-linked disease, we can conclude that if hemophilia is one of the options provided, it is the correct answer.

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