Pick the false statement(s) from the following.
A. Amphibians are devoid of exoskeleton.
B. Balanoglossus is connecting link between non-chordates and chordates.
C. In Urochordata, notochord is only present in the larval stage.
D. Jaw-less chordates are also called Gnathostomata, whereas some are with jaws are also called Agnatha.