Problem: A CBC is done on a patient admitted for a severe hemorrhage. The patient has a normal wbc and rbc count with an markably elevated high platelet count ( 6 5 7 , 0 0 0 / uL ) . The blood smear can be seen below. A bone marrow exam is performed and a proliferation of megakaryocytes is noted. Molecular analysis shows a JAK 2 mutation. This patient most likely has? a . reactive thrombocytosis b . Iron deficiency anemia c . essential thrombocythemia d . polycythemia vera