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Which of the following is most infectious disease?

1. Hepatitis - B
2. AIDS
3. Amoebiosis
4. Malaria

Correct answer: Hepatitis - B

Solution

Hepatitis B is highly infectious because it can spread efficiently through blood, sexual contact, and from mother to child. AIDS is caused by HIV, which is less easily transmitted, while amoebiosis and malaria require different, less direct transmission patterns.

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