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': 'Vector for T.cruzi is - \nSelect and explain. \nA. Reduvid bug, B. Tsetse fly, C. Sand fly, D. Hard tick', 'role': 'user'}, {'content': 'Answer: A \nExplanation: T.cruzi passes its life cycle I two host Definitive host- humans Intermediate host-triatomine bugs Humans become infectious when reduviid bug bites and the infected faecal matter is discharged near bite wound (refer pgno:49 baveja 3 rd edition)', 'role': 'assistant'}]