A female with recurrent abortion and isolated prolonged aptt

A female with recurrent abortion and isolated prolonged APTT is most likely associated with

a) Lupus anticoagulant
b) DIC
c) Von Willebrand disease
d) Hemophilia

Correct answer : a) Lupus anticoagulant

The given history and lab finding is suggestive of antiphospholipid antibody syndrome. Important antibodies used for detection of APLA syndrome are: Lupus anticoagulant, Anticardiolipin antibody