<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 55-year-old female presents to clinic with recurrent episodes of abdominal discomfort and pain for the past month. She reports that the pain occurs 2-3 hours after meals, usually at midnight, and rates it as moderate to severe in intensity when it occurs. She also complains of being fatigued all the time. Past medical history is insignificant. She is an office secretary and says that the job has been very stressful recently. Her temperature is 98.6F 37.0C, respiratory rate is 15min, pulse is 67min, and blood pressure is 12298 mm Hg. Her BMI is 34. A physical examination reveals conjunctival pallor and mild tenderness over her epigastric region. Blood tests show:Hb: 10 gmdLTotal count WBC: 11,000 mm3Differential count:Neutrophils: 70Lymphocytes: 25Monocytes: 5ESR: 10 mmhrWhich of the following is the most likely diagnosis?? A: Acute cholecystitis, B: Choledocholithiasis, C: Pancreatitis, D: Duodenal peptic ulcer, E: Gallbladder cancer,  <response>: Based on the information provided in the question stem, the key findings are:- 55-year-old female with recurrent abdominal pain and discomfort that occurs 2-3 hours after meals and at midnight. The pain is moderate to severe. - She also has fatigue. - Vital signs are normal except for mildly elevated blood pressure. - Physical exam shows conjunctival pallor and mild epigastric tenderness.- Blood tests show mild anemia and normal white blood cell count. - ESR is normal.The postprandial timing of the pain, epigastric tenderness on exam, and mild anemia point towards a diagnosis of peptic ulcer disease. The normal white count makes infection less likely. The normal bilirubin and liver enzymes make biliary etiologies like cholecystitis or choledocholithiasis unlikely. The lack of fever and normal amylaselipase make pancreatitis unlikely. Gallbladder cancer would not explain the postprandial pain.D: Duodenal peptic ulcer 