The last three are correct
        
                    
             
        
        
        
Answer:  A surgical wound
Explanation:  
A surgical wound is a cut or incision in the skin that is usually made by a scalpel during surgery. A surgical wound can also be the result of a drain placed during surgery. Surgical wounds vary greatly in size. They are usually closed with sutures, but are sometimes left open to heal.
 
        
             
        
        
        
Answer:
B.Lubricating cartilage at joints