What is required to purchase a handgun from a licensed dealer in Indiana?

In order to purchase a handgun from a licensed dealer in Indiana, a background check is required. This is to ensure that the buyer does not have a criminal history or past that would make them ineligible to own a firearm. While a state-issued permit and proof of firearms training may be required in other states, they are not necessary in Indiana. Therefore, option A is the most correct answer, as it is the only specific and necessary requirement for purchasing a handgun from a licensed dealer in Indiana. Options B and C may be true in some scenarios, but they are not universally required in Indiana. Option D is incorrect because not all the options listed are required in Indiana, just a background check.