Why aren’t the magnifications of both ocular lenses of a binocular microscope used to calculate total magnification?

Explanation:

To calculate the total magnification , of the binocular microscope -

The image of the object under observation only go via only one ocular and then travel to both our eyes ,

And the arrangement of lenses of the binocular is in way , that they are kept side - by - side and are not in a proper alignment with each other .  

answer; i believe the correct answer is (a)0