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 young patient,who got porcelain lamination done for anterior teeth, reports after 2-3 days of cementation to you with complaints of sensitivity, what can be the possible reason: 
Select and explain. 
A. Improper finishing and microleakage, B. Adhesion and cohesion failure, C. Improper etching, D. Remaining bacteria which is causing sensitivity
A: Improper finishing and microleakage
Answer: A: Improper finishing and microleakage 
Explanation: Interfacial microleakage that occurs as a result of the setting contraction of the composite restorations may cause pulpal irritation.