This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Medicine
Drug used in RSV infection in children 
Select and explain. 
A. Rituximab, B. Palivizumab, C. none, D. Omalizurnab
B: Palivizumab
Answer: B: Palivizumab 
Explanation: Palivizumab is a chimeric mouse-human monoclonal IgG antibody against human respiratory syncitial virus infection.Combined ribavarin-palivizumab therapy is being evaluated for immunosuppressed children with HRSV pneumonia. Ref:Harrison's medicine-19th edition,page no:1206.