This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parasitology Pa 1 (Protozoology), Subject name: Microbiology
[{'content': 'Parasitic disease affecting intestine is - \nSelect and explain. \nA. Chagas disease, B. Malaria, C. Kala azar, D. Oriental sore', 'role': 'user'}, {'content': "Answer: A \nExplanation: Option 1 Trypanosoma Cruzi: In chronic stage infection, damage occurs to Auerbach's plexus leads to dilatation of various pas of alimentary canal, especially the colon and esophagus the mega(dilatation) disease. Option 2, 3 Malaria- Systemic manifestations Kala azar- Visceral leishmaniasia Option 4 Oriental Sore (Old-World Cutaneous Leishmaniasis): it is caused by L. tropica complex (L. tropica, L. aethopica, L. major).", 'role': 'assistant'}]