Match column - I, II and III and choose the correct option.
A. A - V, t; B - II, s; C -I, r; D -III, q; E -IV, p
B. A - I, t; B - II, s; C - III, r; D - IV, p; E - V, q
C. A - V, p; B - II, s; C - I, q; D - III, r; E - IV, t
D. A - V, p; B - III, q; C - II, s; D - I, t; E - IV, r
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Correct Answer : A.
The figures show the types of placentation. Placentation is the arrangement of the placenta or placentae in the ovary of a flower. The function of placentation is to transfer nutrients from maternal tissue to a growing embryo. A: Marginal placentation is found in monocarpellary ovary. In this ovary is unilocular and ovules arranged along margin of unilocular ovary. Examples - pea, Clitoria, groundnut. B: Axile placentation is found in bi- or multicarpellary and multilocular ovary. Ovules are arranged along the central axis of placenta and the number of chambers corresponds to the number of carpels. Examples - lemon, tomato, Hibiscus, cotton. C: Parietal placentation is found in bi- or multicarpellary ovary but unilocular. Ovules are arranged along periphery or the inner wall of the ovary and number of placentae corresponds to the number of carpels. Examples - Cucurbita, Argemone. D: Free central placentation is found in multicarpellary, syncarpous ovary. Ovules are borne along the central axis which is not connected with the ovary wall by septum. Example - Dianthus roam Primrose. E: Basal placentation is found in monocarpellary but unilocular. In this placentation, the placenta develops at the base of the ovary and a single ovule is attached to it. Examples - sunflower, marigold.