Anti Phospholipid Syndrome (APS) is associated with all of the following, except:
Pancytopenia
Recurrent aboions
Venous thrombosis
Pulmonary hypeension
Venous thrombosis, recurrent aboions and pulmonary hypeension are recognized manifestations of Anti Phospholipid Syndrome (APS). So the single best answer of choice by exclusion is pancytopenia. Ref: Harrison's Principles of Internal Medicine, 16th Edition, Pages 1681-82, 1959, 1964, 1967; Davidson's Principles and Practice of Medicine, 19th Edition, Page 954