The correct option is Delegated permissions obtained via end user consent.

Delegated permissions obtained via end user consent are the permissions an application has when it acts on behalf of a signed in user and they are granted through the user's consent. These permissions are the ones you classify when you need to identify permissions that users can approve without administrator involvement.

App only permissions that must be approved by an administrator is incorrect because application permissions are granted to the app itself and they require administrator consent rather than end user consent.

App only permissions that claim to be grantable by users is incorrect because app only permissions cannot be granted by regular users and any statement that users can grant them is incorrect.

Delegated permissions that require administrator approval is incorrect because delegated permissions are normally consented to by users and only a subset of high privilege delegated permissions require administrator consent. The question specifically targets permissions obtained via end user consent.

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