Match the following columns and select the correct option :
- (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
- (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
- (a)-(i), (b)-(iv), (c)-(iii), (d)-(ii)
- (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
Answer
(4) (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
Solution
(a) As per NCERT, cyclostomes (e.g., Petromyzon, Myxine) have 6-15 pairs of gill slits for respiration (ii).
(b) Cartilaginous fishes (Chondrichthyes, e.g., sharks) have a heterocercal tail fin (iii).
(c) Bony fishes (Osteichthyes) have an air bladder which regulates buoyancy (iv).
(d) As per NCERT, some cartilaginous fishes possess a poison sting, e.g., Trygon (sting ray) (i).
(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i).
Answer: (4)