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: Medicine
Lupus anticoagulants may cause all of the following except- 
Select and explain. 
A. Recurrent abortion, B. False +ve VDRL results, C. Increase prothrombin time, D. Arterial thrombosis
C: Increase prothrombin time
Answer: C: Increase prothrombin time 
Explanation: None