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: Pathology
Choristoma is - 
Select and explain. 
A. Normal tissue in abnormal site, B. Normal tissue in excess at normal site, C. Abnormal tissue at any site, D. None of the above
A: Normal tissue in abnormal site
Answer: A: Normal tissue in abnormal site 
Explanation: None