<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 56-year-old man presents to his general practitioner with frequent episodes of facial flushing for the past 2 weeks. He says the episodes are associated with mild headaches and a sensation of fullness in his head and neck. Additionally, he has developed recurrent, often severe, itching after taking a hot shower. The patient denies any smoking history but says he drinks alcohol socially. His blood pressure is 16090 mm Hg, and his temperature is 37.0C 98.6F. On physical examination, his face and neck appear red. Cardiac examination reveals a regular rate and rhythm. Lungs are clear to auscultation bilaterally. The spleen is noted to be palpable just below the costal margin. A complete blood count shows a hemoglobin level of 19.5 gdL, a total leukocyte count of 12,000mm3, and a platelet count of 450,000mm3. Which of the following sets of abnormalities is most likely present in this patient?? A: Blood viscosity, blood flow with blast cells, B: Blood viscosity, blood flow with an M-spike of immunoglobulin G, C: Blood viscosity, blood flow, erythropoietin, ferritin, D: Blood viscosity, blood flow with an M-spike of immunoglobulin M, E: Blood viscosity, blood flow, erythropoietin,  <response>: This is a clinical vignette describing a 56-year-old man with episodes of facial flushing, mild headaches, sensation of fullness in the head and neck, severe itching after hot showers, hypertension, and splenomegaly. Key findings include elevated hemoglobin, normal leukocyte count, normal platelet count. The elevated hemoglobin indicates increased blood viscosity and the symptoms described are consistent with impaired blood flow. The normal leukocyte and platelet counts make blast cells or an M-spike less likely. The lack of anemia makes low erythropoietin unlikely. Therefore, the answer is likely to contain increased blood viscosity and decreased blood flow.E: Blood viscosity, blood flow, erythropoietin 