Question

Huntington's disease is a familial and rare inherited neurological disorder affecting up to: a. 8 people per 100,000 b. 1 per 20,000 people of Western European decent c. I per one million in people of Asian and African descent d. All of the above

Short answer

Answer: All of the above. The disease affects 8 people per 100,000, 1 per 20,000 people of Western European descent, and 1 per one million in people of Asian and African descent.

Step-by-step solution

Option a: 8 people per 100,000

Huntington's disease is said to affect 8 people per 100,000. This information could be correct, but we need to analyze the other options as well before making a conclusion.

Option b: 1 per 20,000 people of Western European decent

In this option, the prevalence of Huntington's disease is given as 1 per 20,000 people of Western European descent. This could also be a correct answer, but again, we need to consider the other options.

Option c: 1 per one million in people of Asian and African descent

This option states that the disease affects 1 per one million people of Asian and African descent. While this information might be true, we still need to check the last option.

Option d: All of the above

This option suggests that all the given answers are correct. Since each of the options a, b, and c provides information about the prevalence of Huntington's disease in different populations, it is possible that all of them are true.

Conclusion

Based on our analysis of each option, the correct answer is option d: All of the above. This is because each of the given options provides information about the prevalence of Huntington's disease in different populations, and there is no contradiction between them.