<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A previously healthy 39-year-old man comes to the physician because of a 1-month history of fatigue and red-colored urine. His vital signs are within normal limits. Physical examination shows pallor and jaundice. His platelet count is 90,000mm3 and creatinine concentration is 1.0 mgdL. A direct Coombs test is negative. Flow cytometry shows erythrocytes deficient in CD55 and CD59 surface antigens. This patient is at greatest risk for which of the following complications?? A: Radiolucent gallstones, B: Acrocyanosis, C: Venous thrombosis, D: Hepatocellular carcinoma, E: Chronic lymphocytic leukemia,  <response>: This is a clinical vignette describing a patient with a 1-month history of fatigue, red urine, pallor, jaundice, thrombocytopenia, and normal renal function. The key finding is a deficiency of CD55 and CD59 surface antigens on erythrocytes, which indicates paroxysmal nocturnal hemoglobinuria PNH. PNH is associated with complement-mediated intravascular hemolysis and thrombosis. C: Venous thrombosis 