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An example of axile placentation is
A
Marigold
B
$Argemone$
C
$Dianthus$
D
Lemon
Detailed Solution
In axile placentation the placenta is axial and the ovules are attached to it in a multilocular ovary, as in china rose, tomato and lemon.
Marigold (and sunflower) have basal placentation: a single ovule attached at the base of a unilocular ovary.
$Argemone$ (and mustard) have parietal placentation: ovules on the inner wall of the ovary.
$Dianthus$ (and primrose) have free central placentation: ovules on a central axis without septa.
Hence the example of axile placentation is lemon.
Marigold (and sunflower) have basal placentation: a single ovule attached at the base of a unilocular ovary.
$Argemone$ (and mustard) have parietal placentation: ovules on the inner wall of the ovary.
$Dianthus$ (and primrose) have free central placentation: ovules on a central axis without septa.
Hence the example of axile placentation is lemon.