Adoptive immunity is by:
Ans. is 'c' i.e., Injection of lymphocytes(Ref: Jawetz, 27th/e, p. 130)* An extract of immunologically competent T - lymphocytes, known as transfer factor can be used in the treatment of lepromatous leprosy when CMI is low.
Infection
Injection of antibodies
Injection of lymphocytes
Immunization
Immunology