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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Which of the following is not a natural composite?
assistant
The correct answer is  Composite literally meaning “made up of several parts or elements.”
Enamel and dentine acts as composite structure. 
Hydroxyapatite crystals acts as ﬁller.