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
Contraindications of  Cast restorations are all except: 
Select and explain. 
A. Grossly carious tooth, B. Occlusal disharmony, C. Young patients due to high pulp chambers, D. Esthetics
A: Grossly carious tooth
Answer: A: Grossly carious tooth 
Explanation: Contraindications

Small and shallow cavities.
High plaque / caries indices.
Occlusal disharmony.
Dissimilar metals.
Esthetics.
Young patients due to presence of large pulp chambers.
Old patients due to lengthy and multi step procedures.