The points A , B and R are coplanar with point C and E , Option B is the correct answer.
What is the meaning of Co planar ?
Two points are called co planar when they lie on the same surface , for example all the points in a circle are co planar.
In the given figure The points A , B and R are co planar with point C and E , C and E are not co planar with each other .
Therefore Option B is the correct answer.
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