Please select all correct statements about portal apps creation.

Answer options:

A.You can create only one portal app per Dataverse environment for the same language
B.Power Apps portal provides several Dataverse Starter portal templates
C.You can create only ten portal apps per environment for the same Dynamics 365 template and language
D.You can create Starter, Partner, and Community portals in the same environment with installed Dataverse database and Dynamics 365 apps.
E.You can present data from any data source in Portal apps

Correct Answers: A and D 
Portal is one of the Power Apps products. By default, the user can create one portal app per Dataverse environment for the same language. Portal requires a Dataverse database installed in the environment. 
If users in their Power Apps environments have installed Microsoft Dynamics 365 apps, they can use five additional templates: Community portal — this template is for partners and customers that can use case management, forums, blogs.
Customer self-service portal — this template is for partners and customers that can submit problems, search a knowledge base, and participate in the forums.
Employee self-service portal — this template is for the employees that can use a knowledge base and submit problems.
Partner portal — this template is for the partners to work with accounts and opportunities.
Customer portal — this template is for the customers of the Dynamics 365 Supply Chain Management system.
Options A is correct because users can create only one portal app per Dataverse environment for the same language. But they can have any additional Starter portals in different languages.
Options D is correct because if users are Microsoft Dynamics 365 Sales or Dynamics 365 Service customers, they can create Starter, Partner, and Community portals in the same environment.
Options B is incorrect because the Power Apps portal provides only one Dataverse Starter portal template.
Options C is incorrect because you can create only one portal app per environment for the same Dynamics 365 template and language.
Options E is incorrect because the Power Apps portals present data only from Dataverse.
For more information about Portal apps creation, please visit the below URLs: 

https://docs.microsoft.com/en-us/powerapps/maker/portals/portal-templates
https://docs.microsoft.com/en-us/powerapps/maker/portals/create-portal