Common character between Nereis, Pila and Anopheles is

Read the given statements

$\left(\mathrm{A}\right)$ Locusta is considered a gregarious arthropod

$\left(\mathrm{B}\right)$ This pest has jointed appendages and attacks crops in a group

Select the correct option

Coelom derived from blastocoel is known as

Statement-1: Choanocytes are characteristic cells of porifera.

Statement-2: Choanocytes are ciliated cells lining spongocoel.