Classification of animals

House fly, butterfly, tsetse fly and silverfish are all insects.
Spiny anteater is a mammal, cuttlefish is a mollusc and silverfish is an insect, and spiders and scorpions are arachnids.

Petromyzon (lamprey) is an ectoparasite on fishes and belongs to Cyclostomata.
Adamsia is a cnidarian, Ichthyophis is an amphibian and Limulus is an arthropod.

Pila is a mollusc; molluscs have a soft, unsegmented body with a head, muscular foot and visceral hump, and a mouth with a radula.
So 'body segmented' is wrong for Pila.
The characters given for Periplaneta, Asterias and Sycon are correct.

The animals shown are: (a) tapeworm ($Taenia$, Platyhelminthes), (b) jellyfish ($Aurelia$, Cnidaria), (c) octopus (Mollusca) and (d) scorpion (Arthropoda).
Molluscs and arthropods are coelomates, so (c) octopus and (d) scorpion both have a true coelom. This statement is correct.
Cnidoblasts are present only in cnidarians, i.e., in (b); the tapeworm and the scorpion do not have them.
The tapeworm respires through its body surface, but the scorpion respires by book lungs.
The jellyfish is radially symmetrical, but the octopus is bilaterally symmetrical.
Hence the correct statement is that (c) and (d) have a true coelom.

$Aurelia$ is a coelenterate with cnidoblasts, but coelenterates have a tissue level of organisation, not organ level, so this row is wrong.
$Ascaris$ has separate sexes, but its body is unsegmented and it belongs to Aschelminthes (Nematoda), not Annelida, so this row is wrong.
$Pteropus$ (flying fox) is a mammal with hair, but it is viviparous, not oviparous, so this row is wrong.
$Salamandra$ belongs to class Amphibia; in amphibians a tympanum represents the ear and fertilisation is described as external (NCERT general characters of Amphibia), so this row is taken as correct.
Hence the correctly matched genus is $Salamandra$.

$Spongilla$ is a fresh water sponge (phylum Porifera); sponges have collar cells or choanocytes lining the spongocoel and canals. Choanocytes are not found in the leech (Annelida), dolphin (Mammalia) or penguin (Aves). This statement is correct.
Sponges are mostly asymmetrical, so all four are not bilaterally symmetrical.
The dolphin is a mammal and, like the penguin (a bird), is homoiothermic; so the penguin is not the only warm-blooded one.
$Spongilla$ is a fresh water form, not marine, so the statement about the leech alone being a fresh water form is wrong.
Hence the correct statement is that $Spongilla$ has choanocytes, which are absent in the remaining three.