PCM vs PLM: which statement is true?

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Multiple Choice

PCM vs PLM: which statement is true?

Explanation:
PCM uses phase-contrast microscopy to count asbestos fibers in air samples collected from the workplace. PLM uses polarized light microscopy to identify asbestos in bulk materials by examining their optical properties. That’s why the true statement is that PCM analyzes air samples while PLM analyzes bulk samples. The other ideas don’t fit because PCM isn’t used to identify asbestos in bulk materials (it’s for counting fibers in air), and PLM isn’t used for counting airborne fibers (that role is filled by PCM).

PCM uses phase-contrast microscopy to count asbestos fibers in air samples collected from the workplace. PLM uses polarized light microscopy to identify asbestos in bulk materials by examining their optical properties. That’s why the true statement is that PCM analyzes air samples while PLM analyzes bulk samples.

The other ideas don’t fit because PCM isn’t used to identify asbestos in bulk materials (it’s for counting fibers in air), and PLM isn’t used for counting airborne fibers (that role is filled by PCM).

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