OIE was formed in 1924 in response to an outbreak of which disease in Europe?

The correct choice is B, as the World Organisation for Animal Health (OIE) was established in 1924 primarily to combat the spread of rinderpest in Europe. Rinderpest is a highly contagious viral disease affecting cattle and other cloven-hoofed animals, causing severe economic losses and significant mortality rates. The formation of the OIE aimed to enhance international cooperation in the control and prevention of animal diseases, particularly those that could threaten livestock and public health.

The establishment of OIE marked a significant step in global animal health governance, as it set the groundwork for collaboration among countries to improve veterinary practices and disease reporting. Addressing rinderpest was crucial at the time, as it demonstrated the need for a coordinated international response to infectious diseases.

While rabies, influenza, and psittacosis are important animal health concerns, they were not the primary impetus for the creation of the OIE. Rinderpest's impact in Europe during the early 20th century highlighted the necessity for a formal organization to manage zoonotic and economically important animal diseases, which is why rinderpest is the correct answer to this question.