Given below are two statements. One is labelled Assertion (A) and the other is labelled Reason (R).

Assertion (A): Nereis has parapodia, but earthworms and leeches lack parapodia.

Reason (R): Nereis is dioecious, but earthworms and leeches are monoecious.

In light of the above statements, choose the correct answer from the options given below.

Nereis is dioecious but earthworms and leeches are monoecious. Nereis has parapodia but earthworms and leeches lack parapodia. Parapodia are the lateral appendages of aquatic annelids like Nereis, which help in swimming locomotion. Their presence or absence is not related to the sexuality (dioecious or monoecious). Setae are useful for locomotion in earthworms. Leeches use suckers for locomotion.