This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
Adoptive immunity is by? 
Select and explain. 
A. Infection, B. Injection of antibodies, C. Injection of lymphocytes, D. Immunization
C: Injection of lymphocytes
Answer: C: Injection of lymphocytes 
Explanation: Aadoptive immunity: a special type of immunisation is the injection of immunologically competent lymphocytes. - instead of whole lymphocytes, an extract of immunologically competent lymphocytes, known as the transfer factor can be used. Reference: Anathanarayan & paniker's 9th edition, pg no:84 <\p>