If the plot is rectangular, the area is the product of the length and width, so looks like it is probably
... A = LW = (11.7 cm)×(15.4 cm) = 180.18 cm²
Of the choices listed, the value that most accurately represents this is ...
... 180.18 cm²
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The perimeter of the rectangular plot would be accurately represented as 54.2 cm (not cm²).
Without any real guide as to the geometry, we can only speculate what the given measurements are. They could be axes of an ellipse, height and base of a triangle, or any number of other geometric descriptors. "A plot" is pretty non-specific as to shape.