This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Platelet & Coagulation disorders, Subject name: Medicine
Which of the following is given to treat thrombocytopenia secondary to anti-cancer therapy and is known to stimulate progenitor megakaryocytes? 
Select and explain. 
A. Filgrastim, B. Oprelvekin, C. Erythropoietin, D. Anagrelide
B: Oprelvekin
Answer: B: Oprelvekin 
Explanation: Oprelvekin or recombinant interleukin-11- used in management of chemotherapy-induced thrombocytopenia S/E- fluid retention, hea failure, and arrhythmias. Two drugs that activate the thrombopoietin receptor: Romiplostim Eltrombopag These are used in idiopathic thrombocytopenia.