Step 1: Understanding the Question:
This question tests knowledge of nematode anatomy.
Step 2: Detailed Explanation:
Nematodes have a tetradially symmetrical reproductive system.
This means the reproductive system has four-fold radial symmetry.
The body is bilaterally symmetrical, but the reproductive system is tetradially symmetrical.
Triradially symmetrical (B): Found in some cnidarians.
Bilaterally symmetrical (A): The overall body symmetry, not the reproductive system.
Thus, the nematode reproductive system is tetradially symmetrical.
Step 3: Final Answer:
Thus, the nematode reproductive system is tetradially symmetrical, which corresponds to option (C).
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