This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': 'Anti-phospholipid Antibody syndrome is Characterized by all except \nSelect and explain. \nA. Antibodies directed against phospholipid binding proteins., B. Inhibition of syncytiotrophoblast differentiation., C. Central nervous system involvement is least common., D. High risk of placental infarction and early-onset pre-eclampsia.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Central nervous system involvement is one of the most prominent clinical manifestations in APLAS.', 'role': 'assistant'}]