Q.Prawn belongs to the class
a. crustacea
b. Annelida
c. Coelenterata
d. Echinodermata

Prawn is India's most important cultured aquatic crustacean, valued for flesh that is palatable, glycogen- and protein-rich, and low in fat. Its fishery divides into four types by location — shallow water prawn fishery (west coast), estuarine/backwater/saline-lake prawn fishery (western backwaters, Ennur, Pulicat, Chilka lake, the Ganga–Brahmaputra estuaries), freshwater prawn fishery (rivers and lakes across India), and marine prawn fishery (mainly family Penaeidae along the coast) — with Penaeus indicus, Penaeus monodon, Metapenaeus dobsoni and Macrobrachium rosenbergii the commonly cultured species. Freshwater prawn culture (chiefly Macrobrachium rosenbergii) rears mated pairs in aerated spawning tanks (24–30°C, pH 7–8) through larval stages to a …