This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: parasitology, Subject name: Microbiology
[{'content': 'Most common parasite causing myocarditis is - \nSelect and explain. \nA. Trichinella, B. Trypanosome, C. Ascaris, D. Plasmodium', 'role': 'user'}, {'content': 'Answer: A \nExplanation: There are 3 stages in the life cycle of trichinella spiralis stage of intestinal invasion Malaise,nausea , vomiting, diarrhoea,abdominal cramps .onset within 2-30 hours of ingestion of food. stage of muscle invasion fever, myalgia, periorbital edema ,hemorrhage in subconjuctiva, myocarditis, and encephalitis. stage of encystation:final stage All symptoms subside Ref: panickers textbook of medical parasitology 8th edition page 173.', 'role': 'assistant'}]