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': 'Runt disease is - \nSelect and explain. \nA. Graft rejection, B. Graft versus host reaction, C. Deficient T cell function, D. Complement deficiency', 'role': 'user'}, {'content': "Answer: B \nExplanation: The graft mounts an immune response against the antigens of the host is called graft-versus-host reaction. The main clinical features of the GVH reaction in animals are retardation of growth, emaciation, diarrhea, hepatosplenomegaly, lymphoid atrophy, and anemia. - terminates fatally. This syndrome is called runt disease. Reference:athanarayan & paniker's 9th edition, pg no: 186 <\\p>", 'role': 'assistant'}]