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: Pathology
Which is the least resistant to 02 depletion ? 
Select and explain. 
A. Liver, B. Hea, C. Kidney, D. Spleen
B: Hea
Answer: B: Hea 
Explanation: Ans. is 'b' i.e., Hea