y does the ocular micrometer need to be calibrated with a stage micrometer?

a. The stage micrometer is a slide that has a defined scale and the distances
between lines don’t change when viewed at different magnifications, unlike
the ocular micrometer.
b. The distance between the lines on the ocular micrometer depends on
magnification and it must be calibrated at every magnification.
c. The distance between the lines on the stage micrometer depends on
magnification and it must be calibrated at every magnification.
d. The stage micrometer is used directly to measure specimens at any
magnification.
e. Both a and b are correct statements.
I said B. Agree?

Yes, you are correct. Option B is the correct answer. The ocular micrometer needs to be calibrated with a stage micrometer because the distance between the lines on the ocular micrometer depends on magnification and it must be calibrated at every magnification. The stage micrometer, on the other hand, is a slide with a defined scale where the distances between lines do not change when viewed at different magnifications. Therefore, it is used as a reference to calibrate the ocular micrometer at different magnifications.

Yes, I agree with option B. The ocular micrometer needs to be calibrated with a stage micrometer because the distance between the lines on the ocular micrometer depends on the magnification and therefore must be calibrated at every magnification. The stage micrometer, on the other hand, is a slide that has a defined scale and the distances between the lines do not change when viewed at different magnifications.