The fact that the inner corner of a room looks farther away than the outer corner of a building provides one explanation of the:

Correct option is D

The Müller-Lyer illusion involves lines with arrow-like endings that appear different in length despite being equal. The "carpentered world hypothesis" explains this: inward-pointing arrows resemble inner corners (receding), while outward-pointing arrows resemble outer corners (protruding). Our experience with buildings and rooms causes us to perceive inner corners as farther away, making the line appear longer.
​
Information Booster:
• Müller-Lyer illusion demonstrates depth perception in 2D
• Based on misapplied size constancy
• Cultural differences exist (less pronounced in non-Western cultures)
• Inward arrows (><) appear longer than outward arrows (<>)
• Demonstrates how past experience influences perception
• Gregory's theory links it to perspective interpretation

Additional Knowledge:
• Option (A) Ponzo illusion: Two identical lines appear different when placed on converging lines (railroad track effect)
• Option (B) Ames room: Distorted room making people appear different sizes
• Option (C) Poggendorf illusion: Diagonal line appears misaligned when interrupted by parallel lines