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 – heterogenous, C. Homodimer – heterogenous, D. Homodimer – homogenous', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Structure of Na+K+ pump\n2 subunits- α subunit is larger and β subunit is smaller. \nHence it is Heterodimer.\nα subunits- α1, α2 & α3 isoforms.\nβ subunits- β1, β2 & β3 isoforms. Hence it is heterogeneous.', 'role': 'assistant'}]