Anti Phospholipid Syndrome (APS) is associated with all of the following, except:

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