<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 58-year-old female, being treated on the medical floor for community-acquired pneumonia with levofloxacin, develops watery diarrhea. She reports at least 9 episodes of diarrhea within the last two days, with lower abdominal discomfort and cramping. Her temperature is 98.6 F 37 C, respiratory rate is 15min, pulse is 67min, and blood pressure is 12298 mm Hg. Her physical examination is unremarkable. Laboratory testing shows:Hb 13 gmdLTotal count WBC: 13,400mm3Differential count: Neutrophils: 80 Lymphocytes: 15 Monocytes: 5ESR: 33 mmhrWhat is the most likely diagnosis?? A: Ulcerative colitis, B: C. difficile colitis, C: Irritable bowel syndrome, D: Osmotic diarrhea, E: Giardiasis,  <response>: This is a patient with community-acquired pneumonia being treated with levofloxacin who develops watery diarrhea. Key findings are:- 58 year old female - Being treated for pneumonia with levofloxacin- Develops watery diarrhea, abdominal discomfort and cramping after starting antibiotics- No fever - Normal WBC, increased neutrophils- ESR elevated The most likely diagnosis in this setting of antibiotic-associated diarrhea is C. difficile colitis. Levofloxacin can disrupt normal gut flora and allow overgrowth of C. difficile leading to toxin mediated diarrhea. The other choices are less likely in this specific clinical scenario.B: C. difficile colitis 