The diagram depicts a sketch of a human cheek cell. On the diagram, the separation between points X and Y is $30\ \text{mm}$. The true length of the cell from X to Y is $60\ \mu\text{m}$. What is the magnification of the cell?
- A$\times 50$
- B$\times 200$
- C$\times 500$
- D$\times 2000$