Does custard apple comes under multiple fruits or aggregate fruits?

Answer 1

A cluster or aggregation of many ripened ovaries (fruits) produced from a single flower. In blackberries and raspberries (Rubus), the individual fruits are tiny, one-seeded drupes or drupelets. Since all the seed-bearing ovaries (carpels) form a fused cluster, the fruit is also called a syncarp. In strawberries (Fragaria), the individual fruits are tiny, one-seeded achenes imbedded in a sweet, fleshy receptacle. Another term for an aggregate cluster of ovaries all derived from a single flower is the "etaerio." In fact, a rose hip (Rosa) eaten as an entire fruit could be considered an etaerio of achenes enclosed by a fleshy receptacle.

Fruits of the genus Annona (Annonaceae), including the sugar apple (A. squamosa), cherimoya (A. cherimola), custard apple (A. reticulata) and soursop (A. muricata) resemble large fleshy berries with scales or projections on the outer surface. They are actually composed of many ovaries fused together and are technically aggregate fruits called syncarps. They are not multiple fruits because they develop from a single flower bearing many pistils (carpels)