Which of the following statements are true or false?
$(i)$ Suckers are found in liver fluke.
$(ii)$ In Arthropods,fertilization is external.
$(iii)$ Chordata is divided into $4$ subphyla.
$(iv)$ Water vascular system is present in Hemichordata.

• A
  $(i), (ii)$ true,$(iii), (iv)$ false
• B
  $(i)$ true,$(ii), (iii), (iv)$ false
• C
  $(ii), (iii), (iv)$ true,$(i)$ false
• D
  $(i), (iv)$ true,$(ii), (iii)$ false