In exoskeleton of arthropods ,
I. chitinous plates present over the body are called sclerites .
II.sclerites are joined with the help of soft membranous structure called arthrodial membrane .
III.the dorsal sclerites are called tergum , ventral sclerites as sternum and lateral sclerites are called pleura.
IV. epidermis is present above the cuticle , called hypodermis.
A. Only IV
B. II , and III
C. I , II and IV
D. I , II and III