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
Upshaw-schulman syndrome is: 
Select and explain. 
A. Inherited thrombotic thrombocytopenic purpura, B. Acquired thrombotic thrombocytopenic purpura, C. Thrombotic thrombocytopenic purpura with anemia, D. Thrombotic thrombocytopenic purpura with bone marrow failure
A: Inherited thrombotic thrombocytopenic purpura
Answer: A: Inherited thrombotic thrombocytopenic purpura 
Explanation: Upshaw-schulman syndrome is inherited thrombotic thrombocytopenic purpura. Ref: Harrisons principles of internal medicine, Edition -18, Page - 969.