A) placoid scale
B) placoid scale and ventral mouth
C) ventral mouth
D) ctenoid scale and ventral mouth
Correct Answer: B
Solution :
Chondrichthyes (cartilaginous fishes) are marine. Their mouth is ventral and they have cartilaginous endoskeleton/ Dermal placoid scales are present, e.g., Scoliodon, Pristis, etc.
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