Select the figure from the options which is embedded in the figure given below (Rotation is not allowed). [Figure: A complex figure made of several overlapping squares, triangles and lines inside a square frame. Options (a) to (d) are small line figures: (a) an irregular triangle shape, (b) an upward arrow, (c) a triangle with a bow-tie shaped part, (d) a small vertical line with a flag-like shape.]