Identify the correct statements about the phylum Arthropoda:
a. They have exoskeleton, segmented body, and jointed appendages.
b. They are all aquatic animals.
c. They have a non-segmented body and no appendages.
d. They are all terrestrial animals.
I- Statement a is correct.
II- Statement b is incorrect.
III- Statement c is incorrect.
IV- Statement d is incorrect.
a) I and IV are correct.
b) II and III are correct.
c) Only I is correct.
d) Only IV is correct.