Resource group in Azure

You are working with a Resource group in Azure. In the given context, which of these are valid best practices that need to be followed while doing so?

1. Provide a description of every parameter in the metadata

2. Use a literal value or a language expression to specify defaults for optional parameters

3. Use allowedValues sparingly.

Options

1. Only 1,2
2. Only 2,3
3. Only 3
4. Only 1
5. All 1,2,3