A disease in human beings caused by a virus is _______.

The correct option is B

Influenza

The correct option is (b).

Explanation of the correct option:

Influenza:

1. Influenza is a viral infection that causes symptoms like blocked nose, high fever, irritation and rashes around face, runny nose, etc.
2. There are four types of influenza viruses: A, B, C and D.
3. Human influenza A and B viruses cause seasonal epidemics of disease.

Explanation of the incorrect options:

Option A:

1. Typhoid is a bacterial disease caused by Salmonella typhi.

Option C:

1. Dysentery is a bacterial disease caused by Entamoeba histolytica

Option D:

1. Cholera is a bacterial disease caused by Vibrio cholerae.

Final answer: A disease in human beings caused by a virus is Influenza.