Match the following columns and select the correct option.

Column-I           Column-II

(a) 6-15 pairs of - (i) Trygon gill slits

(b) Heterocercal - (ii) Cyclostomes caudal fin

(c) Air Bladder - (iii) Chondrichthyes

(d) Poison sting - (iv) Osteichthyes

(1) (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

(2) (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)

(3) (a)-(i), (b)-(iv), (c)-(iii), (d)-(ii)

(4) (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)