Which method is used to dehydrate a specimen during sample preparation?

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Utilizing 10% formalin solutionApplying liquid or solid carbon dioxideEmploying progressively higher concentrations of alcoholTreating with 5% nitric acid

Explanation

Dehydration of specimens is typically achieved by gradually exposing them to increasing concentrations of alcohol. This process removes water from the tissue, preparing it for further processing. Other options like formalin, carbon dioxide, or nitric acid do not serve as dehydration agents in this context.