Which term is a liquid consisting of natural resins in an organic solvent?

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Multiple Choice

Which term is a liquid consisting of natural resins in an organic solvent?

Explanation:
Varnish is a liquid made by dissolving natural resins in an organic solvent. This mixture can be spread smoothly, and when the solvent evaporates, a hard resin film remains to protect the surface. That combination—resins plus solvent forming a liquid coating—is what defines varnish. The other terms don’t describe a liquid of natural resins in a solvent: a sedative is a medication to calm the system, the smear layer is a debris layer on a tooth surface after preparation, and thermal relates to heat rather than a resin-coating liquid.

Varnish is a liquid made by dissolving natural resins in an organic solvent. This mixture can be spread smoothly, and when the solvent evaporates, a hard resin film remains to protect the surface. That combination—resins plus solvent forming a liquid coating—is what defines varnish. The other terms don’t describe a liquid of natural resins in a solvent: a sedative is a medication to calm the system, the smear layer is a debris layer on a tooth surface after preparation, and thermal relates to heat rather than a resin-coating liquid.

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