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: Pharmacology
Thalidomide, used for multiple myeloma, is : 
Select and explain. 
A. Associated with diarrhea, B. Characterized by enantiomeric interconversions, C. Metabolized extensively by hepatic CYP system, D. Safe for use in pregnant females
B: Characterized by enantiomeric interconversions
Answer: B: Characterized by enantiomeric interconversions 
Explanation: None