This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vasculitis, Subject name: Pathology
Which of the following is the most dreaded complication of Kawasaki's disease? 
Select and explain. 
A. Desquamative rash, B. Lymphadenopathy, C. Coronary aneurysms, D. Thrombocytosis
C: Coronary aneurysms
Answer: C: Coronary aneurysms 
Explanation: Kawasaki disease is an acute febrile, usually self-limited illness of infancy and childhood (80% of patients are 4years old or younger); it is associated with an aeritis affecting large to medium-sized, and even small vessels. Its clinical significance stems primarily from a predilection for coronary aery involvement that can cause aneurysms that rupture or thrombose, resulting in acute myocardial infarctions.