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Question

Assertion [A]: Majority of the cells cannot be seen directly with the naked eye.

Reason [R]: All the cells are microscopic in size.

A
Only R is correct
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B
Both A and R are correct, but R is not the correct explanation for A
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C
Both A and R are correct, and R is the correct explanation for A
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D
Only A is correct
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Solution

The correct option is D Only A is correct
Most of the cells are microscopic in size. Hence, they are not visible to the naked eye. They need to be enlarged or magnified by a microscope to be seen. E.g., the bacterial cell (0.1 to 0.5 mm). On the other hand there are certain cells, like the egg of a hen, which can be seen with the unaided eye.

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