How do productive and allocative efficiency differ in monopolistic competition compared to perfect competition?

• A. Productive efficiency is achieved in monopolistic competition, but allocative efficiency is not.
• B. Neither efficiency is achieved in monopolistic competition, while both are achieved in perfect competition.
• C. Allocative efficiency is achieved in monopolistic competition, but productive efficiency is not.
• D. Both efficiencies are achieved in monopolistic competition but not in perfect competition.

Answer: (B)