What is the legal ruling on a pharmacist giving contraceptives to unmarried individuals to avoid the birth of an illegitimate child, given the concern about aiding immorality?

It is not permissible to sell grains to someone known to use them for illicit purposes, as that constitutes aiding in sin. The sin of illegitimate children, resulting from not using contraceptives, falls upon those who commit indecency, not upon those who refrained from aiding them in it.