This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Immunosuppressive drugs are less effective in which type of graft rejection ? 
Select and explain. 
A. Acute cellular rejection, B. Acute humoral rejection, C. Chronic rejection, D. None of the above
B: Acute humoral rejection
Answer: B: Acute humoral rejection 
Explanation: Ans. is 'b' i.e., Acute humoral rejectionBecause most clinically available immunosuppressive drugs target T-cells, they or inefective in antibody mediated rejection".