book:

• Rose (A) has a perigynous flower (II), where the gynoecium is situated in the centre and other parts are on the rim of the thalamus .
• Pea (B) exhibits marginal placentation (IV), where the placenta forms a ridge along the ventral suture of the ovary .
• Cotton (C) exhibits twisted aestivation (I), where one margin of the appendage overlaps the next one .
• Mango (D) is a type of fruit known as a drupe (III), which develops from a monocarpellary superior ovary .