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
Fully humanized antibodies used in the treatment of RA? 
Select and explain. 
A. Anakinra, B. Adolimumab, C. Infliximab, D. Leflunamide
B: Adolimumab
Answer: B: Adolimumab 
Explanation: Ans is 'b' i.e., Adolimumab Etanercept: TNF type II receptor fused to IgG 1 o Infliximab: Chimeric human-mouse monoclonal antibody to TNF o Adolimumab: Fully human anti-TNF antibody