[[1]] is a figure that has neither a line of symmetry nor a rotational symmetry.

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Detailed Solution

A scalene triangle is a figure that has neither a line of symmetry nor rotational symmetry.
The line of symmetry is the line through which the figure is folded to get aligned exactly.
A scalene triangle is a triangle with all the lengths of sides of different measurements.
Due to this property, it doesn't have any line of symmetry and rotational symmetry.
Hence, the correct answer is a scalene triangle.

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