Trochophore larva is found in

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

$Option$	Animals	Morphological features
$(a)$	Scorpion,spider,cockroach	Ventral solid central nervous system
$(b)$	Cockroach,locust,Taenia	Metameric segmentation
$(c)$	Liver fluke,sea anemone,sea cucumber	Bilateral symmetry
$(d)$	Centipede,prawn,sea urchin	Jointed appendages

Which of the following is true for $Nereis$,$Scorpion$,$Cockroach$,and $Silverfish$?

Given below are two statements:
Statement $I$: When any plane passing through the central axis of the body divides the organism into two identical halves, it is called radial symmetry.
Statement $II$: In phylum Echinodermata, both adults and larvae are radially symmetrical.
In the light of the above statements, choose the most appropriate answer from the options given below:

Which of the following phyla exhibit bilateral symmetry?

The branch of science dealing with the study of birds is