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
True regarding Na+ - K+ pump 
Select and explain. 
A. Hetrodimer - homogenous, B. Hetrodimer - hetrogenous, C. Homodimer - hetrogenous, D. Homodimer - homogenous
B: Hetrodimer - hetrogenous
Answer: B: Hetrodimer - hetrogenous 
Explanation: B i.e. Hetrodimer hetrogenous