What is the minimum age to apply for a handgun license in Indiana?

To apply for a handgun license in Indiana, you must be at least 21 years old. This is because the minimum age requirement to purchase and possess a handgun in Indiana is 18 years old, but to obtain a license, you must also be a legal adult. Additionally, the minimum age to obtain a valid state identification card or driver's license in Indiana is also 18 years old, making 21 years old the minimum age to have both the necessary documents and meet the legal adult requirement for a handgun license. Option A, 18 years old, may seem like the correct answer since it is the minimum age to purchase a handgun, but it does not meet the legal adult requirement. Options C and D, 16 and 25 years old respectively, are both incorrect and not within the age range of the minimum age requirement to obtain a handgun license in Indiana. Therefore, the best answer is B, 21 years old.