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': 'The hookworm thrives on - \nSelect and explain. \nA. Whole blood, B. Plasma, C. Serum, D. RBC', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Human hookworms are distributed in all tropical and subtropical countries.Adult worms live in small intestine of man,mostly in jejunum,less often in duodenum and rarely in the ileum (refer pgno:142 baveja 3 rd edition)', 'role': 'assistant'}]