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 regarding Na+ - K+ pump \nSelect and explain. \nA. Hetrodimer - homogenous, B. Hetrodimer - hetrogenous, C. Homodimer - hetrogenous, D. Homodimer - homogenous', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Hetrodimer hetrogenous', 'role': 'assistant'}]