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In a perfectly competitive market choose the correct statement from the following.

(A) Equilibrium occurs where market demand equals market supply.

(B) Each firm employs labour upto the point where the marginal revenue of labour equals the wage rate.

(C) Equilibrium price and quantity are determined when there is large number of firms.

(D) Equilibrium price is always equal to minimum average cost of the firms.

Choose the correct answer from the options given below:

Solution

✅ Correct Option: 1

Option 1 -> Statements A, B, and D are correct. Statement C is incorrect because equilibrium is determined by demand-supply intersection, not merely by the number of firms.

Option 2 -> Statement B is also correct as firms hire labor until marginal revenue product equals wage rate, so this option is incomplete.

Option 3 -> Statement C is problematic. While large number of firms is a characteristic of perfect competition, equilibrium is determined by demand-supply intersection, not by the number of firms itself.

Option 4 -> Statement A is correct and must be included as equilibrium fundamentally occurs where demand equals supply.


Hence, Option 1: (A), (B) and (D) only -> Statement (A) is correct as market equilibrium occurs where demand equals supply. Statement (B) is correct as firms maximize profit by hiring labor until marginal revenue product of labor equals wage rate. Statement (D) is correct as in long-run equilibrium of perfect competition, price equals minimum average cost (zero economic profit condition). Statement (C) is incorrect because while large number of firms is a characteristic of perfect competition, equilibrium price and quantity are determined by the intersection of market demand and supply curves, not by the number of firms per se. -> correct

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