Correct Option: D. Price is fixed below equilibrium level Detailed Explanation: Understanding Price Control: Price controls are government-imposed limits on the prices that can be charged for goods and services in a market. These controls can take two main forms: price ceilings and price floors.

1. Price Ceiling: This is a maximum price set by the government. It is intended to make essential goods affordable for consumers. When a price ceiling is set below the equilibrium price, it leads to a situation where the quantity demanded exceeds the quantity supplied, resulting in a shortage.
2. Price Floor: This is a minimum price set by the government. It is often used to ensure that producers receive a minimum income. When a price floor is set above the equilibrium price, it leads to a situation where the quantity supplied exceeds the quantity demanded, resulting in a surplus.

Why Option D is Correct: - When we say "price is fixed below equilibrium level," we are referring to a price ceiling. For example, if the equilibrium price of a product is $10, and the government sets a price ceiling of $8, this means that sellers cannot charge more than $8. At this price, consumers want to buy more than what is available (demand exceeds supply), leading to a shortage. Why Other Options are Incorrect:

• Option A: Price is fixed at equilibrium level.
• This option suggests that the price is set at the point where supply equals demand. While this is the natural market outcome without intervention, price controls specifically refer to situations where the government intervenes to set prices. Therefore, this option does not accurately describe price control.
• Option B: Price is fixed above equilibrium level.
• This option describes a price floor, not a price ceiling. While a price floor can lead to surpluses, it does not represent the concept of price control in the context of the question, which is focused on price ceilings. Thus, this option is not relevant to the question about price control.
• Option C: Price is not fixed but determined by demand and supply.
• This option describes a free market scenario where prices fluctuate based on market forces. Price controls, by definition, involve government intervention to fix prices, so this option contradicts the concept of price control.

Common Pitfalls:

• Confusing Price Ceilings and Price Floors: It's essential to remember that price ceilings lead to shortages (when set below equilibrium), while price floors lead to surpluses (when set above equilibrium).
• Assuming Market Equilibrium is Always Achieved: In the presence of price controls, the market does not reach equilibrium, which can lead to inefficiencies and unintended consequences.

Revision Summary:

• Price controls are government interventions that set limits on prices.
• A price ceiling is a maximum price set below equilibrium, leading to shortages.
• A price floor is a minimum price set above equilibrium, leading to surpluses.
• Understanding the implications of price controls is crucial for analyzing market dynamics.