Who is responsible for approving the Project Plan?
The Project Board approves the Project Plan, satisfying PRINCE2's defined accountability for the plan's authorisation. This responsibility sits with the Board because it commits resources and controls the project at each stage boundary, whereas the Project Manager drafts the plan and the Team Manager executes work packages.
Why this answer
In PRINCE2, the Project Board is the project's ultimate decision-making authority, sitting above the Project Manager and owning overall accountability for the project. Approving the Project Plan (and the Project Initiation Documentation that contains it) is a formal board-level decision because the plan commits the organisation's resources and defines the baseline against which the project will be controlled. The Project Manager drafts the plan, but only the Project Board can authorise it.
Exam trap
PRINCE2F often tests the distinction between the role that creates a product (Project Manager) and the role that approves it (Project Board), catching candidates who assume the person who writes the plan also signs it off.
How to eliminate wrong answers
Option A is wrong because the Senior User represents user interests and provides requirements and benefits sign-off, but does not have the authority to approve the Project Plan. Option B is wrong because the Project Manager creates and updates the Project Plan but cannot approve it — approval is deliberately kept above the Project Manager to preserve the 'manage by exception' control. Option D is wrong because the Executive is only one of the three Project Board roles; approval of the Project Plan is a collective Project Board decision, not an Executive-only action.