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(B) The correct answer is $B$. In $Dianthus$,the type of placentation is free central. In free central placentation,the ovary is unilocular (single-ch

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(B) The correct answer is $B$. In $Dianthus$,the type of placentation is free central. In free central placentation,the ovary is unilocular (single-chambered) and the ovules are borne on a central axis that is not connected to the ovary wall by septa. Figure $B$ illustrates this arrangement,where the ovules are attached to a central column within a single-chambered ovary,which is characteristic of the family $Caryophyllaceae$ (e.g.,$Dianthus$ and $Primrose$).

Which one of the following figures represents the placentation in Dianthus?

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