The combination of goods which are beyond the boundary line of the PPC is often regarded as which of the following?                                     

Unattainable combination

The correct answer is option 2: Unattainable combination

• The Production Possibility Curve (PPC) represents the maximum possible output combinations of two goods that an economy can produce with available resources and technology.
• Any point beyond the PPC boundary represents a combination of goods that the economy cannot currently produce because it lacks sufficient resources or technology.
• Therefore, such a combination is called an Unattainable Combination because it lies outside the production possibilities of the economy.
• These can only be achieved if there is a shift in PPC due to increase in resources of the economy or technology.