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: Microbiology
A 10 year old boy following a road traffic accident presents to the casualty with contaminated wound over the left leg. He has received his com- plete primary immunization before preschool age and received a booster of DT at school entry age. All of following can be done except : 
Select and explain. 
A. Injection of TT, B. Injection of human antiserum, C. Broad spectrum antibiotics, D. Wound debridement and cleaning
B: Injection of human antiserum
Answer: B: Injection of human antiserum 
Explanation: None