Which of the following have "ommatidia" as unit of eye

Options

A. Pheretima
B. House flies
C. Pila
D. Sepia

Answer

B

Explanation

The compound eyes of arthropods like insects, crustaceans, millipedes are composed of units called Ommatidium. An ommatidium contains a cluster of photoreceptor cells surrounded by support cells and pigment cells.