Solution:Statement B & D are not true.
The Policy Ineffectiveness Proposition (PIP) is a theory, primarily within new classical economics, suggesting that anticipated monetary policy cannot consistently influence real GDP or employment levels.
This proposition, developed by Robert Lucas, Thomas J. Sargent & Neil Wallace, hinges on the idea of rational expectations, flexbile prices of Wages, and market clearing mechanisms.
Where individiuals accurately anticipate the actions of policymakers & adjust their behavior accordingly.