Which best describes a difference between primary (deciduous) teeth and their permanent successors?

Correct answer: C. Crowns are wider mesiodistally than inciso-gingivally (shorter/squatter)

• A. This statement is actually TRUE (primary teeth have proportionally larger pulp chambers/horns) — making the item arguable.
• B. False — enamel is THINNER in primary teeth.
• C. Correct (keyed). Primary crowns are wider mesiodistally relative to their inciso-gingival height (squat appearance) compared with permanent teeth.
• D. False — primary teeth are LIGHTER/whiter, not darker.

Note: Both the keyed answer (C) and option A are true statements about primary teeth, so this item has two arguably correct choices; the keyed answer is C.

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