The diagram shows a stage micrometer scale viewed through an eyepiece containing a graticule.
The small divisions of the stage micrometer scale are 0.1 mm.
The stage micrometer scale is replaced by a slide of a plant cell.
What is the actual length of the nucleus in the plant cell?
 
            1 )
$8\mu m$
$25\mu m$
3 )
$200\mu m$
4 )
$0.8{\text{ }}mm$
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