<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 63-year-old man with non-Hodgkin lymphoma is brought to the emergency department because of fever and confusion that have progressively worsened over the past 3 days. He also has a 3-day history of loose stools. He returned from France 2 weeks ago where he stayed in the countryside and ate typical French cuisine, including frog, snail, and various homemade cheeses. His last chemotherapy cycle was 3 weeks ago. He is oriented to person but not to place or time. His temperature is 39.5C 103.1F, pulse is 110min, and blood pressure is 10060 mm Hg. Examination shows cervical and axillary lymphadenopathy. The lungs are clear to auscultation. There is involuntary flexion of the bilateral hips and knees with passive flexion of the neck. Neurologic examination shows no focal findings. Laboratory studies show:Hemoglobin 9.3 gdLLeukocyte count 3600mm3Platelet count 151,000mm3SerumNa 134 mEqLCl- 103 mEqLK 3.7 mEqLGlucose 102 mgdLCreatinine 1.3 mgdLA lumbar puncture is performed. Cerebrospinal fluid analysis shows a leukocyte count of 1200mm3 76 segmented neutrophils, 24 lymphocytes, a protein concentration of 113 mgdL, and a glucose concentration of 21 mgdL. The results of blood cultures are pending. Which of the following is the most appropriate initial pharmacotherapy?? A: Ampicillin and cefotaxime, B: Ampicillin, gentamicin, and dexamethasone, C: Acyclovir and dexamethasone, D: Acyclovir, E: Vancomycin, ampicillin, and cefepime,  <response>: This is a clinical case scenario about a 63-year-old man with non-Hodgkin lymphoma presenting with fever, confusion, diarrhea, and neurologic symptoms. Based on the information provided, the main differential diagnoses to consider are:- Bacterial meningitis: The CSF analysis showing neutrophilic pleocytosis, hypoglycorrhachia, and elevated protein supports this. His symptoms, recent travel, and immunocompromised state from chemotherapy raise suspicion for a bacterial etiology. - Viral encephalitis: His symptoms could also indicate viral encephalitis, especially given his immunocompromised state. The CSF lymphocytic pleocytosis could support a viral cause. - Drug fever: His recent chemotherapy puts him at risk for neutropenic fever. The question is asking for the most appropriate initial pharmacotherapy, so I need to choose antibiotics that would empirically cover the most likely bacterial pathogens causing meningitis in this context.E: Vancomycin, ampicillin, and cefepime 