Select the structures absent in Chondrichthyes
A. Air bladder
B. Operculum
C. Claspers in male
D. Scroll valve
E. Cloaca

A, B & E

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B & C

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D & E

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A & B

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Solution

The correct option is C A & B
The correct answer is option D.
Chondrichthyes or the cartilaginous fishes have a cloaca. Male fishes have claspers that are used in copulation. The scroll valve is present in the intestine. The cartilaginous fishes do not have an operculum and air bladder.

Suggest Corrections

	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