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
The preferred material for repair of fractured denture base is: 
Select and explain. 
A. Chemically cured resin, B. Heat cured resin, C. Light cured resin, D. Vinyl resin
A: Chemically cured resin
Answer: A: Chemically cured resin 
Explanation: REPAIR OF ACRYLIC RESIN DENTURES
An acrylic denture fractured in service can be repaired. Repair resins maybe:

Heat cure (OR)
Self cure

Heat cured resin
These resins are cured at 74oC for 8 hours or more. The use of a heat-cured resin will tend to warp the denture during processing.
Self-cured resin
Although the repair with a self-cured resin invariably has a lower transverse strength than that of the original heat-cured denture base resin, self-cured resins are usually preferred because warpage is insignificant as curing is done at room temperature.
Reference: Mannapallil Basic SCIENCE OF DENTAL MATERIALS, 4th ed page no 561