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 person has received complete immunization against tetanus 10 years ago. Now he presents with a clean wound without any lacerations from an injury sustained 2.5 hours ago. He should now be given - 
Select and explain. 
A. Full course of tetanus toxoid, B. Single dose of tetanus toxoid, C. Human tet globulin, D. Human tet globulin and single dose of toxoid
B: Single dose of tetanus toxoid
Answer: B: Single dose of tetanus toxoid 
Explanation: None