This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'What enhances the multiplication of T cells in culture - \nSelect and explain. \nA. Phytohemagglutinin, B. Chemotactic factor, C. Leukotrienes, D. Prostaglandins', 'role': 'user'}, {'content': 'Answer: A \nExplanation: T cells undergo blast transformation (multiplication) on treatment with mitogens such as : - \n\n\xa0 \xa0 \xa0 \xa0- Phytohemagglutinin (PHA)\n\xa0 \xa0 \xa0 \xa0- Concanavalin A (Con A)\n\xa0 \xa0 \xa0 \xa0-\xa0Anti CD-3\n\nB Cells undergo a similar transformation with : -\n\n\xa0 \xa0 \xa0 - Bacterial endotoxins\n\xa0 \xa0 \xa0 -\xa0Staphylococcus aureus\n\xa0 \xa0 \xa0 - EB virus\n\xa0 \xa0 \xa0 - Anti Ig\nRemember :\nMature B and T cells before they encounter antigen are called naive cells.', 'role': 'assistant'}]