Influenza is capable of genetic reassortment in which genetic components from two influenza strains reassort between themselves. Which animal strains of influenza prove especially virulent when reassorted with human strains?A. dogs and catsB. ducks and swineC. cows and sheepD. goats and horses

The correct answer is - option B. ducks and swine.

Explanation:

Influenza virus is capable of the genetic reassortment. This reassortment involves the reassortment of genetic parts in between two influenza strain. This takes place due to the ability of influenza virus to alter or modify the structure of Hemagglutinin (HA) and neuraminidase.

Some other characters also helps them to develop different strains for different host such as mutation, antigenic drift and many other conditions. Influenza virus subtype A are belongs to the avian host so they affect the birds such as duck, swan, gesse. Other than avian variants there is another strain that affect pigs known as swan variants. These strains are virulent if reassorted with human strains.

Thus, the correct answer is - option B.