Match the following columns and select the correct option.
Column $-I$ | Column $-II$
$(a)$ $6-15$ pairs of gill slits | $(i)$ Trygon
$(b)$ Heterocercal caudal fin | $(ii)$ Cyclostomes
$(c)$ Air Bladder | $(iii)$ Chondrichthyes
$(d)$ Poison sting | $(iv)$ Osteichthyes

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