This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
[{'content': 'The standard of care in splenectomy patients involves the use of all the above vaccines except \nSelect and explain. \nA. H Influenzae type b, B. Meningococcal vaccine, C. Pneumococcal vaccine, D. Typhoid vaccine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Currently, the standard of care for postsplenectomy patients includes immunization within 2 weeks of splenectomy with: Polyvalent pneumococcal vaccine (PPV23), H. influenzae type b conjugate, and Meningococcal polysaccharide vaccine Ref - Bailey and love 27e Liver p1175', 'role': 'assistant'}]