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
An example of IMiD (Immunomodulatory derivatives of thalidomide) is: 
Select and explain. 
A. Pavalizumab, B. Rbavirin, C. Lenalidomide, D. None of the above
C: Lenalidomide
Answer: C: Lenalidomide 
Explanation: Owing to thalidomide's serious toxicity profile, considerable effo has been expended in the development of analogs. Immunomodulatory derivatives of thalidomide are termed IMiDs. Some IMiDs are much more potent than thalidomide in regulating cytokines and affecting T-cell proliferation. Lenalidomide is an IMiD that in animal and in vitro studies has been shown to be similar to thalidomide in action, but with less toxicity, especially teratogenicity. Ref: Katzung 11th edition Chapter 61.