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: Surgery
Whitehead's varnish in gauze is used to arrest bleeding from: 
Select and explain. 
A. Bleeding from capillaries., B. Bleeding from bone., C. Bleeding from skin., D. All of the above.
B: Bleeding from bone.
Answer: B: Bleeding from bone. 
Explanation: None