Apixaban is a new drug that acts by :: (A) Inhibiting TNF alpha, (B) Inhibiting coagulation factor Xa, (C) Inhibiting platelet aggregation, (D) Activating plasminogen
Answer is B. Rivaroxaban and Apixaban are newer oral anticoagulants that act by inhibiting factor Xa.
Newer oral anticoagulants that are currently being asked in the exams are:

Dabigatran (Direct thrombin inhibitor)
Rivaroxaban
Apixaban