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
A 56 year old female presented with breast carcinoma and she was prescribed herceptin (trastuzumab). Which of the following statements regarding this drug is true ? 
Select and explain. 
A. It is an antibody produced entirely from mouse containing no human component., B. It is a monoclonal antibody produced by injecting her2 antigen., C. It is a polyclonal antibody, D. It is a monoclonal antibody containing only human component
B: It is a monoclonal antibody produced by injecting her2 antigen.
Answer: B: It is a monoclonal antibody produced by injecting her2 antigen. 
Explanation: None