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: Dental
A Dentist notices a rash on a child’s wrist while treating a fractured tooth. Upon enquiry, the child says that he was wearing a metal bracelet in that region. Which type of crown should he use for restoring this tooth. 
Select and explain. 
A. Porcera All Ceram, B. Porcelain fused to metal, C. Stainless steel crown, D. Resin  bonded FPD
A: Porcera All Ceram
Answer: A: Porcera All Ceram 
Explanation: None