Adjacent sides of polygon are:
Any two sides of the polygon
Any two sides with a common vertex
Any two sides of connecting two non-consecutive vertices of a polygon
All of these
We have a polygon ABCD
Here, one pair of adjacent sides are ABandBC.
And in ABandBC, the common vertex is B.
Hence, the correct answer is option B.
Two sides of a polygon which meet at a common point are called adjacent sides of the polygon.