Coverslip is put on the slide very gently to avoid :
A
Entry of air bubbles
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B
Crushing of the material
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C
Oozing of glycerine
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D
None of these
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Solution
The correct option is A Entry of air bubbles
Coverslip is fixed on the microscopic slide, where the sample is mounted. It is mounted in such a way that no air bubbles are trapped. When air bubbles are trapped, the microscopic view will not look clear and the bubbles will be seen in the view.