Morphology of Flowering Plants

The fruit of pomegranate (Punica granatum) is a special type of fleshy fruit called a balausta.
It develops from a multicarpellary, syncarpous, inferior ovary.
The fruit is divided into several chambers by thin papery septa, and the rind (pericarp) is tough and leathery.
Each seed has a juicy, succulent testa, which is the edible part of the fruit.
Guava is a berry and cucumber is a pepo; both develop from an inferior ovary, but their edible part is not a succulent testa.
Orange is a hesperidium, which develops from a superior ovary and has juicy hairs arising from the endocarp as the edible part.
So the description fits pomegranate.

Cypsela is a dry, indehiscent, one-seeded fruit that develops from a bicarpellary, syncarpous, unilocular, inferior ovary with basal placentation.
The pericarp and the seed coat remain free from each other, and the fruit often bears a hairy pappus (persistent calyx) for dispersal.
It is the characteristic fruit of the family Asteraceae (Compositae), for example sunflower and marigold.
A berry is a fleshy, many-seeded fruit.
A cremocarp is a two-seeded schizocarpic fruit of Apiaceae (for example coriander) that splits into two mericarps.
A caryopsis is a one-seeded dry fruit of grasses formed from a monocarpellary superior ovary, in which the pericarp is fused with the seed coat.
So the fruit described is a cypsela.

Syconus is a composite (multiple) fruit that develops from a hypanthodium inflorescence, as in fig (Ficus).
In a hypanthodium the receptacle is fleshy and forms a hollow, flask-shaped cavity with a small opening (ostiole) at the top; numerous small flowers are borne on its inner wall.
After fertilisation, each female flower forms a small, dry, one-seeded, indehiscent fruitlet called an achene.
So the fleshy receptacle, which is the edible part, encloses a large number of achenes; these are the tiny hard grains felt while eating a fig.
Berries are fleshy many-seeded fruits, mericarps are the one-seeded parts of a schizocarpic fruit, and samaras are winged dry fruits; none of these is formed inside a fig.
So the syconus of fig encloses a number of achenes.

The replum is a false septum that develops between the two parietal placentae of the ovary.
It is characteristic of the family Brassicaceae (Cruciferae), to which mustard belongs.
The gynoecium of mustard is bicarpellary and syncarpous with a superior ovary that is unilocular at first; it becomes bilocular due to the formation of the replum.
The fruit of mustard is a siliqua, in which the seeds remain attached to the replum after the two valves separate.
Sunflower (Asteraceae) has a unilocular ovary with basal placentation, pea (Fabaceae) has a monocarpellary ovary with marginal placentation, and lemon (Rutaceae) has a multilocular ovary with axile placentation; none of these has a replum.
So the replum is present in the ovary of mustard.