Which of the following compounds is a ketone? 
Definitions:
Standard Deviation
An indicator of the extent of variability or spread in a dataset, showing the degree to which the values deviate from the average.
Median
The middle value of a data set when it is arranged in ascending or descending order.
10th Percentile
A value below which 10% of the data fall, often used in statistics to show lower extremes of a distribution.
Cyclopentanone
A five-membered cyclic ketone, characterized by a ring structure containing one ketone group, used as a precursor in the synthesis of fragrances and pharmaceuticals.
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