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
what is true about keloids 
Select and explain. 
A. it appears immediately after surgery, B. it appears a few days after surgery, C. it is limited in its distribution, D. it is common in old people
B: it appears a few days after surgery
Answer: B: it appears a few days after surgery 
Explanation: None