(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
(a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
(a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
Correct option is C. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
(a) Pila is a Mollusc. The mouth contains a file-like rasping organ for feeding called a radula.
(b) Bombyx is an Arthropod. In Bombyx excretion takes place through Malpighian tubules.
(c) Pleurobrachia is Ctenophore. The body bears eight external rows of ciliated comb plates, which help in locomotion.
(d) Taenia is a platyhelminth; specialized cells called flame cells help in osmoregulation and excretion.
So, the correct answer is '(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)'