Cartilaginous fishes do not have–
Operculum
Scales
Gill slits
Pelvic fins
Cartilaginous fishes do not have
Column-I
Column-II
(a)
Scales and paired fins absent
(i)
Torpedo
(b)
Claspers on pelvic fins of males
(ii)
Cyclostomes
(c)
4 pairs of gills covered with operculum
(iii)
Chondrichthyes
(d)
Electric organs
(iv)
Osteichthyes