Which of the following pairs is correctly matched?

Which one of the following groups of three animals is correctly matched with their one characteristic morphological feature?

In which one of the following is the genus name,its two characters,and its class/phylum correctly matched?

Genus Name	Two Characters $\&$ Class/Phylum
$A$. $Ascaris$	$(i)$ Body segmented,$(ii)$ Males and females distinct; Phylum: $Annelida$
$B$. $Salamandra$	$(i)$ $A$ tympanum represents ear,$(ii)$ Fertilization is external; Class: $Amphibia$
$C$. $Pteropus$	$(i)$ Skin possesses hair,$(ii)$ Oviparous; Class: $Mammalia$
$D$. $Aurelia$	$(i)$ Cnidoblasts present,$(ii)$ Organ level of organization; Phylum: $Coelenterata$

Which of the following statements is correct for the given animal group?

Identify the location and function of the following structures:
$(i)$ Water vascular system
$(ii)$ Cloaca
$(A)$ $(i)$ Location: Phylum $Echinodermata$; Function: Locomotion, food capture, and respiration. $(ii)$ Location: Posterior body part of amphibians, reptiles, birds, and some fishes; Function: Common chamber for digestive, reproductive, and urinary tracts.
$(B)$ $(i)$ Location: Phylum $Chordata$; Function: Excretion. $(ii)$ Location: Anterior body part; Function: Digestion only.
$(C)$ $(i)$ Location: Phylum $Mollusca$; Function: Respiration. $(ii)$ Location: Dorsal side; Function: Excretion only.
$(D)$ $(i)$ Location: Phylum $Arthropoda$; Function: Circulation. $(ii)$ Location: Ventral side; Function: Reproduction only.

Which of the following organisms possess a four-chambered heart?