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Answer: 3. Thecodont, Diphyodont, Heterodont

Key idea: Human teeth are of three kinds of arrangement.

  • Thecodont: teeth are set in sockets of the jaw bone.
  • Diphyodont: two sets of teeth (milk and permanent).
  • Heterodont: different types of teeth (incisors, canines, premolars, molars).

Answer: option 3.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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