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
[{'content': 'What is produced by lung tissue to be used in lungs? \nSelect and explain. \nA. Angiotensin I, B. Renin, C. Surfactant, D. Angiotensin II', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is'c'i.e., SurfactantAmong the given options, two substances are formed in lung-Surfactant: Used by lungs alveoli to reduce surface tension.Angiotensin II : ACE in lungs conve angiotensin I to angiotensin II. But angiotensin II mainly acts on blood vessels, kidney and adrenal coex.", 'role': 'assistant'}]