Diffraction Is Observed Around an Obstacle of Size $\approx$ 20 $\lambda$ If the Obstacle Is Reduced in Size To 20

Multiple Choice

Diffraction is observed around an obstacle of size $\approx$ 20 $\lambda$ . If the obstacle is reduced in size to $\approx$ 2 $\lambda$ , the diffraction effect

A) increases.
B) remains unchanged.
C) decreases.
D) none of the above.