This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology Pa-2 (RNA Virus Pa-1,2 & Miscellaneous Viruses), Subject name: Microbiology
[{'content': 'For post-exposure prophylaxis, dose of human rabies immunoglobulin is: \nSelect and explain. \nA. 10 IU/kg, B. 20 IU/kg, C. 30 IU/kg, D. 40 IU/kg', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Human rabies immune globulin (HRIG): 20 IU/kg, maximum injected locally, rest IM in gluteal region. It is indicated in only in category III bites. Equine rabies immunoglobulin (ERIG)- It is given at dose of 40 IU/kg . Being heterologous in origin (horse), it is associated with serum sickness; hence not in use.', 'role': 'assistant'}]