This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Physiology
Which of the following is not a function of lung? 
Select and explain. 
A. Gaseous exchange, B. Erythropoietin secretion, C. Renin angiotensin system, D. pH maintenance
B: Erythropoietin secretion
Answer: B: Erythropoietin secretion 
Explanation: Metabolic and excretory functions of lungs:Synthesized and used in the lungs SurfactantSynthesized or stored and released into the blood Prostaglandins Histamine KallikreinPaially removed from the blood Prostaglandins Bradykinin Adenine nucleotides Serotonin Norepinephrine AcetylcholineActivated in the lungs Angiotensin I - angiotensin IIRef: Ganong review of medical physiology 23rd edition Page no: 606