9700/12 Biology Oct Nov 2009 Online Test | Cambridge AS and A Level MCQ

The eyepiece lens of a microscope is fitted with an eyepiece graticule.
Which statements about the graticule are correct?
1 It allows you to measure the actual length of cells.
2 It allows you to draw cells with correct proportions.
3 It changes in size as the objective lens changes from $ \times 10$ to $ \times 40$.