Read the following statements and find out the correct statement.
Subphyla Urochordata and Cephalochordata are often referred to as protochordates and are exclusively marine.
All vertebrates are chordates but all chordates are not vertebrates.
Branchiostoma (Amphioxus or Lancelet) belongs to sub-phylum Cephalochordata.
In Ascidia (Urochordata), notochord is present only in larval tail.