A 25-year old pregnant lady presents with thrombocyto-penia (Platelet count < 50,000) and fragmented ' RBC's in peripheral smear. Which of the following is the least likely differentail diagnosis?
Thrombotic Thrombocytopentic Purpura (TTP)
Disseminated Intravascular Coagulation (DIC)
HELLP syndrome
Evan's syndrome