<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 71-year-old man presents to the primary care clinic with non-specific complaints of fatigue and malaise. His past medical history is significant for diabetes mellitus type II, hypertension, non-seminomatous testicular cancer, and hypercholesterolemia. He currently smokes 1 pack of cigarettes per day, drinks a glass of wine per day, and he currently denies any illicit drug use. His vital signs include: temperature, 36.7C 98.0F; blood pressure, 12674 mm Hg; heart rate, 87min; and respiratory rate, 17min. On examination, his physician notices cervical and inguinal lymphadenopathy bilaterally, as well as splenomegaly. The patient comments that he has lost 18.1 kg 40 lb over the past 6 months without a change in diet or exercise, which he was initially not concerned about. The physician orders a complete blood count and adds on flow cytometry. Based on his age and overall epidemiology, which of the following is the most likely diagnosis?? A: Acute lymphocytic leukemia, B: Acute myelogenous leukemia, C: Chronic lymphocytic leukemia, D: Chronic myelogenous leukemia, E: Hairy cell leukemia,  <response>: This is a clinical vignette describing a 71-year-old man with non-specific symptoms of fatigue and malaise. Key findings include lymphadenopathy, splenomegaly, unintentional weight loss, and a history of testicular cancer. Based on the patients age and the presence of lymphadenopathy, splenomegaly, and unintentional weight loss, this clinical presentation is most consistent with a hematologic malignancy such as leukemia or lymphoma. The flow cytometry testing ordered by the physician will help differentiate between various leukemiaslymphomas.Of the answer choices provided, chronic lymphocytic leukemia CLL is the most likely diagnosis given this patients advanced age and the lymphadenopathy on exam. CLL classically presents in older adults with progressive lymphadenopathy, splenomegaly, and symptoms like fatigue from anemia. The other types of leukemia are less likely based on the clinical vignette.C: Chronic lymphocytic leukemia 