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
[{'content': 'Transplacental transfer of antibodies from immunized mother to her newborn is \nSelect and explain. \nA. Natural active immunity, B. Natural passive immunity, C. Acquired active immunity, D. Acquired passive immunity', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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.', 'role': 'assistant'}]