In PRINCE2 quality review meetings, the recommended roles include a Chair, Presenter, Reviewer, and an Administrator. The Administrator is crucial as they organize the logistics of the review meeting, ensure that the necessary materials are provided to the participants in advance, and take on the responsibility of recording results and follow-up actions. Project Manager, Assurance, and Project Support do not specifically align with the roles within a quality review team.
PRINCE2 7 Foundation resources and study materials.

According to PRINCE2principles, the business case theme requires documenting the management actions necessary to ensure benefits are realized. This involves planning, measuring, and managing the realization of benefits, and it's critical for maintaining the relevance and justification of the project. References: PRINCE2 Foundation Handbook, Business Case Theme section.

The purpose of the 'Organizing' practice within PRINCE2 is to establish and define the project management team structure and responsibilities. This includes specifying roles and responsibilities for managing, delivering, and overseeing the project effectively. The organization theme supports project success by ensuring clear definition and communication of who is responsible for various project activities.References:
PRINCE27 Foundation guide and official PRINCE2 documentation on organizing practices.

The purpose of the 'Initiating a Project' process is to provide the Project Board with just enough information to decide whether to approve the initiation stage. This process involves the development of a more detailed Business Case and Project Plan, which are crucial for the Project Board to assess the project's viability and decide on its initiation confidently. References: PRINCE2 official guide and syllabus.

Explanation
Reference http://prince2.wiki/Quality#The_Quality_Knowledge_provided_by_PRINCE2