Edible part in 'sorosis', a composite fruit, is
cotyledons
endosperm
perianth and peduncle
fleshy thalamus
C.
perianth and peduncle
Sorosis is the composite fruit that develops from spike and catkin, eg, in pineapple edible part develops from perianth and peduncle.
Fleshy thalamus is an edible part of pear, apple fruit, eg, pome fruits.
Cotyledons are edible part of cashewnut, eg, nut fruits.
Endosperm is an edible part of caryopsis of wheat, rice, etc.
Trimerous flower, superior ovary and axile placentation is characteristics of
Liliaceae
Cucurbitaceae
Solanaceae
Compositae