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Question

Free-central placentation is found in

A
Citrus
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B
Dianthus
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C
Argemone
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D
Brassica
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Solution

The correct option is B Dianthus
The arrangement of ovules within the ovary is called placentation.

Free-central placentation is found in Dianthus. In this type of placentation, the ovules are borne on the central axis of the ovary. The ovary is usually unilocular due to the absence of septa.



The type of placentation in Argemone and Brassica (mustard) is parietal. In parietal placentation, the ovules develop directly on the inner wall of the ovary or on the peripheral part.

The type of placentation in Citrus is axile. Here, the placenta is located on a central column (placenta is axial) to which the ovules are attached. The ovary is usually multilocular due to the formation of septa which creates chambers (locules) inside the ovary.

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