Which animal is not susceptible to vesicular exanthema virus?

Answer: Option B

Horse is not susceptible to vesicular exanthema virus.
Vesicular exanthema is an acute, febrile disease of swine characterized by the formation of vesicles on the snout, tongue, and teats, within the oral cavity, and on the feet (between the claws and on the coronary band).
Healthy horses are more disease resistant, so provide good nutrition, regular exercise, deworming and routine vaccinations to prevent such diseases.