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
Cock’s peculiar tumour is 
Select and explain. 
A. infected sebaceous cyst, B. osteomyelitis of skull, C. cyst in the skull, D. tumour of the skull
A: infected sebaceous cyst
Answer: A: infected sebaceous cyst 
Explanation: None