Solution:

Various types of placentations found in flowering plants are as follows

• Marginal – The placenta forms a ridge that runs across the ovary’s ventral suture, and ovules are carried on the ridge in two rows. Example – Pea

Axile – In a multilocular ovary, the placenta is axial and ovules are linked to it. Lemon is a good example.

Parietal – Ovules form on the ovary’s inner wall or on the periphery. It is single-chambered at first, but as a false septum develops, it becomes two-chambered. Example – Mustard

Basal – A single ovule is linked to the placenta, which develops at the base of the ovary. Example – Marigold

Free central – Septa is missing, and ovules are borne on the central axis. Example – Primrose