Decreased number of platelets is called.. Thrombocytopenia

Decreased number of platelets is called:
a. Thrombectomy
b. Thrombocytopenia
c. Thrombocytopathy
d. Thrombocytosis

Answer B.
Keyword: DECREASED NUMBER OF PLATELETS.
Rationale: thrombocytopenia is a decreased number of platelets.
Thrombocytosis is an excess in the number of platelets. Thrombocytopathy is a platelet dysfunction.
Thrombectomy is the surgical removal of a thrombus.