Select the correct match for $X$ and $Y$:

Column $X$	Column $Y$
$(1)$ Green gland	$(P)$ Mollusca
$(2)$ Digestive tract with digestive glands	$(Q)$ Arthropoda
$(3)$ Straight or coiled alimentary canal	$(R)$ Hemichordata
$(4)$ Straight or $U$-shaped digestive tract	$(S)$ Echinodermata

• A
  $(1-Q), (2-P), (3-S), (4-R)$
• B
  $(1-Q), (2-S), (3-P), (4-R)$
• C
  $(1-R), (2-S), (3-P), (4-Q)$
• D
  $(1-R), (2-P), (3-S), (4-Q)$