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: Physiology
Kidney secretes: March 2013 
Select and explain. 
A. Erythropoietin, B. Angiotensin I, C. Angiotensin II, D. Thrombodulin
A: Erythropoietin
Answer: A: Erythropoietin 
Explanation: Ans. A i.e. Erythropoietin