Transplacental transfer of antibodies from immunized mother to her newborn is

Ans. b (Natural passive immunity). (Ref. Textbook of Microbiology by Anantanarayan 6th/72)# Natural active immunity results from either clinical or inapparent infection by a parasite.# A person who has recovered from attack of chickenpox or of measles develops natural active immunity (lifelong).# Artificial active immunity is by vaccines.# Artificial passive immunity is immune horse serum administration# Transplacental transfer of antibodies from immunized mother to her newborn is natural passive immunity.