Which of the following features is common to both fish and tadpoles?

$S$ - Statement: The presence of cnidoblasts is a characteristic feature of Cnidarians.
$R$ - Reason: In sponges,amphiblastula or parenchymula larvae are observed.

Which of the following animals is hermaphrodite (bisexual)?

Which of the following organisms possess the power of regeneration?

Which of the following statements is incorrect?

Features common to the animals belonging to class-$Amphibia$ and class-$Reptilia$ are