Question

Match column I with column II and choose the correct option.
$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ & \text{(Class)}& & \text{(Character)}\\ \text{(a)}& \text{Cyclostomata}& \text{(i)}& \text{Placoid scales}\\ \text{(b)}& \text{Chondrichthyes}& \text{(ii)}& \text{Cycloid scales}\\ \text{(c)}& \text{Osteichthyes}& \text{(iii)}& \text{Presence of tympanum}\\ \text{(d)}& \text{Amphibia}& \text{(iv)}& \text{Jawless vertebrates}\end{array}$

• A. (a) (b) (c) (d)
  (iv) (i) (ii) (iii)
• B. (a) (b) (c) (d)
  (iv) (ii) (i) (iii)
• C. (a) (b) (c) (d)
  (i) (ii) (iii) (iv)
• D. (a) (b) (c) (d)
  (ii) (i) (iv) (iii)

Answer 1

The correct option is A (a) (b) (c) (d)

(iv) (i) (ii) (iii)
Placoid scales are present in class Chondrichthyes whereas cycloid/ctenoid scales are present in class Osteichthyes. Tympanum represents ear in amphibians. Cyclostomes are jawless fishes.