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
Erythropoietin is secreted by A/E: 
Select and explain. 
A. Hemangioblastoma, B. Hepatoma, C. Renal cell carcinoma, D. Adrenocoical tumours
D: Adrenocoical tumours
Answer: D: Adrenocoical tumours 
Explanation: Di.e. Adrenocoical tumour