Which of the following statements is not true for the deadlock prevention and deadlock avoidance schemes?

• A. Deadlock avoidance is less restrictive than deadlock prevention.
• B. In deadlock prevention, the request for resources is always granted, if the resulting state is safe.
• C. It is the priority to have the knowledge of resource requirements for deadlock avoidance.
• D. In deadlock avoidance, the request for resources is always granted, if the resulting state is safe.