<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 65-year-old man presents with painless swelling of the neck over the past week. He also has noted severe night sweats, which require a change of clothes and bed linens the next day. His medical history is significant for long-standing hypertension. He received a kidney transplant 6 years ago. His current medications include amlodipine, metoprolol, furosemide, aspirin, tacrolimus, and mycophenolate. His family history is significant for his sister, who died last year from lymphoma. A review of systems is positive for a 6-kg 13.2-lb unintentional weight loss over the past 2 months. His vital signs include: temperature 37.8C 100.0F and blood pressure 12075 mm Hg. On physical examination, there are multiple painless lymph nodes, averaging 2 cm in diameter, palpable in the anterior and posterior triangles of the neck bilaterally. Axillary and inguinal lymphadenopathy is palpated on the right side. Abdominal examination is significant for a spleen of 16 cm below the cost margin on percussion. Laboratory studies are significant for the following:Hemoglobin 9 gdLMean corpuscular volume 88 μm3Leukocyte count 12,000mm3Platelet count 130,000mm3Creatinine 1.1 mgdLLactate dehydrogenase LDH 1 000 ULA peripheral blood smear is unremarkable. Which of the following is the most likely diagnosis in this patient?? A: Chronic lymphocytic leukemia CLL, B: Drug-induced lymphadenopathy, C: Cytomegalovirus infection, D: Multiple myeloma, E: Non-Hodgkins lymphoma NHL,  <response>: Based on the information provided in the question stem, this patient is a 65-year-old man with a history of hypertension and kidney transplant 6 years ago who now presents with painless neck swelling, severe night sweats, unintentional weight loss, lymphadenopathy, splenomegaly, anemia, thrombocytopenia, and elevated LDH. The key findings here are the patients age, lymphadenopathy, constitutional symptoms night sweats, weight loss, splenomegaly, cytopenias, and elevated LDH. This presentation is most consistent with a hematologic malignancy. Chronic lymphocytic leukemia CLL typically occurs in older adults and can present with lymphadenopathy and cytopenias. However, splenomegaly and constitutional symptoms are less common. Drug-induced lymphadenopathy, cytomegalovirus infection, and multiple myeloma are less likely based on the clinical and lab findings.Non-Hodgkins lymphoma NHL commonly presents with painless lymphadenopathy, constitutional symptoms, splenomegaly, cytopenias, and elevated LDH. Therefore, NHL is the most likely diagnosis in this patient.E: Non-Hodgkins lymphoma NHL 