Ans: A
The 6-sided polygon on the right rotates anti-clockwise about the point of contact of the two polygons $90^\circ$. Or, the 6-sided polygon on the left rotates clockwise about the point of contact of the two polygons $90^\circ$.
The 6-sided polygon on the right rotates anti-clockwise about the point of contact of the two polygons $90^\circ$. Or, the 6-sided polygon on the left rotates clockwise about the point of contact of the two polygons $90^\circ$.
