In the context of combination locks, which configuration is possible?

• A. A combination lock must be a padlock
• B. A combination lock can be a built-in lock or a padlock
• C. A combination lock can only be used on exterior doors
• D. A combination lock requires a separate key in all cases

Answer: (B)

Combination locks are defined by how you enter the code, not by a single physical form. They can be portable and used as a padlock, or built into a door, cabinet, or safe as a built-in lock. This flexibility is why the configuration can include either a built-in lock or a padlock. They aren’t limited to exterior doors, and they don’t universally require a separate key—many operate with just the combination, though some designs may include a key override or reset option.