It was explained to a student that the true length of a cell structure is $5\,\mu\text{m}$. The student then had to state an equation that could be used to work out the magnification of an electron micrograph of this cell structure. The student chose some of the letters $q$ to $u$ to represent parts of the equation. $q$ = the length of the cell structure image on the micrograph in centimetres $r$ = the length of the cell structure image on the micrograph in millimetres $s = 1000$ $t = \frac{1}{5}$ $u = 5$ Which equation gives the correct magnification?
- A$\frac{q}{s} \times u$
- B$q \times s \times t$
- C$\frac{r}{s} \times u$
- D$r \times s \times t$