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: Ans. is 'b' i.e., It appears a few days after surgery