Which of the following pairs is mismatched?

Question

1] crown-enamel
2] root-root canal
3] alveoli-periodontal ligament
4] pulp cavity-cementum
5] apical foramen-blood supply

Answer 1

Actually, the dental alveoli refer specifically to the "tooth socket" and so are most definitely associated with the periodontal ligaments, although I'm unsure which of the above is mis-matched. If I remember correctly, the pulp cavity has some other layer between it and the cementum, but that may not be correct.

Answer 2

3 AND 4.
ALVEOLI ARE IN THE LUNGS AND HAVE NOTHING TO DO WITH THE PERIODONTAL LIGAMENT WHICH SURROUNDS TEETH.
THE PULP CAVITY IS A COMPLETELY A SEPARATE PART OF THE TOOTH AND IS NOT PART OF THE CEMENTUM WHICH CONNECTS THE ROOT SURFACE TO THE PERIODONTAL LIGAMENT.
THE OTHERS HAVE A DIRECT CORRELATION.