Who is eligible to apply for a handgun license in Indiana?

Any resident over the age of 18 is eligible to apply for a handgun license in Indiana. Option A is incorrect because the age requirement is 18, not 21. Option C is incorrect because while military personnel may have different requirements for obtaining a handgun license, they are not the only ones eligible for one. Option D is incorrect because non-residents do not have regular business in Indiana and therefore are not eligible to apply for a handgun license.