The following schematic drawings show an epithelial sheet. Which example shows a mutant with planar-cell-polarity defects but no other defects?

Question

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In planar cell polarity, the cells in an epithelium are all arranged as if they had an arrow written on them, pointing in a specific direction in the plane of the epithelium. In the examples shown, A represents a normal epithelium, whereas B shows planar-cell-polarity defects. Note that C and D show defects in apical-basal polarity as well.

The Following Schematic Drawings Show an Epithelial Sheet