This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parasitology Pa 2 (Helminthology), Subject name: Microbiology
[{'content': 'A 35 years old man presented with dry cough and rusty coloured sputum; He has history of eating in chinese restraunt very often with consumption of crabs often; What is the probable causative agent in this condition? \nSelect and explain. \nA. Diphyllobothrium latum, B. Pneumocystis jirovecii, C. Paragonimus westermani, D. Strongyloides stercoralis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: from above mentioned clinical scenerion Paragonimus westermani (lung fluke) is moste likely to be causitive organism:- Paragonimus westermani first intermediate host- snail 2nd intermediate host - crab in crab metacercarie larva which is cyst like stage is seen. It causes Red Brown sputum or endemic hemoptysis.', 'role': 'assistant'}]