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': 'True statement regarding difference between apex and base of lung, in erect posture is:March 2012, March 2013 \nSelect and explain. \nA. V/ Q is low at the apex of lung, B. V/ Q is high at the apex of lung, C. V/ Q remain same at both apex and base, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans: B i.e. V/ Q is high at the apex of lungV/ Q changes from region to region of the lung.Thus in apical zone in the erect posture, Q (perfusion) is very low and therefore V/ Q ratio is high. While at the bases, it (V/ Q) is low', 'role': 'assistant'}]