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
What enhances the multiplication of T cells in culture - 
Select and explain. 
A. Phytohemagglutinin, B. Chemotactic factor, C. Leukotrienes, D. Prostaglandins
A: Phytohemagglutinin
Answer: A: Phytohemagglutinin 
Explanation: T cells undergo blast transformation (multiplication) on treatment with mitogens such as : - 

       - Phytohemagglutinin (PHA)
       - Concanavalin A (Con A)
       - Anti CD-3

B Cells undergo a similar transformation with : -

      - Bacterial endotoxins
      - Staphylococcus aureus
      - EB virus
      - Anti Ig
Remember :
Mature B and T cells before they encounter antigen are called naive cells.