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

In which of the following are cleidoic eggs found?

$A$ larval stage occurs in the life history of all members of the group:

Column $-I$ contains the organs of locomotion and Column $-II$ contains the phyla in which they are found. Select the correct combination of the two columns:

Column $-I$	Column $-II$
$(A)$ Pseudopodia	$(i)$ Mollusca
$(B)$ Parapodia	$(ii)$ Chondrichthyes
$(C)$ Muscular foot	$(iii)$ Protozoa
$(D)$ Fins	$(iv)$ Annelida

In which of the following phyla is metamerism (segmentation) observed?

Which of the following pairs are correct?

Animal	Morphological Feature
$(i)$ Crocodile	$4$-chambered heart
$(ii)$ Sea cucumber	Echinodermata (Water vascular system)
$(iii)$ Obelia	Metagenesis
$(iv)$ Lemur	Thecodont