I have few application related queries

1. Military service:

I am a citizen of country where military services are not mandatory while I am domiciled in a country where military services are mandatory..

will it be a right thing to choose "Not applicable" in such a case.

2. Number of employees locally: There is no trusted source through which we can exact no...assuming daily increments or decrements...will it be a good idea to say " approx..XYZ"

I know its too basic...but I am not aware of the extent to which things could be verified later and hence I want to give info to the best of my knowledge

thanks for your time and effort