This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
Dermis involved in the 
Select and explain. 
A. First degree burns, B. Second degree burns, C. Third degree burns, D. Fouh degree burns
C: Third degree burns
Answer: C: Third degree burns 
Explanation: Third degree Full thickness burn Involve all layers of dermis Characterized by hard leathery eschar, that is painless and black, white or cherry red No capillary refilling or pin-prick sensation All dermal and epidermal components are lost Heals only by wound contractures Require excision with skin grafting to heal Ref: Sabiston 20th edition Pgno :506-507