In the scenario described, the government has imposed a price ceiling (Pc), which is a maximum legal price that can be charged for a good or service. When the price is set below the equilibrium price (where supply equals demand), this often leads to a shortage in the market.
In this case, you have quantity demanded at Q1 and quantity supplied at Q2. Since quantity demanded (Q1) is greater than quantity supplied (Q2) at the price ceiling, there is a shortage represented by the difference Q2 - Q1.
Given the options provided, the correct response would be:
the shortage resulting from the price ceiling Pc.