Question: When a service is provided for root and is also added to the provider's configuration for a lazy-loaded module, what instance of that service does the injector provide to constructors in the lazy-loaded module?

1. A new instance of that service is created when the module is lazy loaded.
2. Providing a service of the same type at a lazy-loaded module level is not allowed.
3. If an instance of the service has not been created at the root level yet. it will create one there and then use it.
4. A single instance of that service is always instantiated at root and is the only one ever used, including within lazy modules.

Answer: The correct answer of the above question is Option A:A new instance of that service is created when the module is lazy loaded.