The diagram depicts a stage micrometer scale as seen through an eyepiece that contains a graticule. Each small division on the stage micrometer scale measures $0.1\,\text{mm}$. The stage micrometer scale is then substituted with a slide of a plant cell. What is the real length of the nucleus in the plant cell?
- A$8\,\mu\text{m}$
- B$25\,\mu\text{m}$
- C$200\,\mu\text{m}$
- D$0.8\,\text{mm}$