This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunomodulator, Subject name: Pharmacology
[{'content': 'Immunosuppressive drugs are less effective in which type of graft rejection - \nSelect and explain. \nA. Acute cellular rejection, B. Acute humoral rejection, C. Chronic rejection, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., Acute humoral rejection o On this question, i could get only following refrence -"Because most clinically available immunosuppressive drugs target T-cells, they or ineffective in antibody mediated rejection.".....Textbook of organ transplants', 'role': 'assistant'}]