Which is true about P-iris?

Which is true about P-iris?
A . The P-iris makes use of a novel p-shaped blade that reduces complexity and cost while maintaining image quality
B . In bright situations. P-iris limits the closing of the iris to avoid blurring caused by diffraction when the iris opening becomes too small
C . The P-iris delivers the optimal depth of field by always using the smallest possible aperture for the available lightning
D . The P-iris makes use of a novel p-shaped blade that allows the iris to react to rapidly changing lighting conditions

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Answer: B