Most male nematodes possess gonads that are…

✅Explanation:
The correct answer is monorchic. While the term monodelphic can be used to describe having a single gonad in general, when referring specifically to male nematodes, the term monorchic is more accurate and commonly used. This means that male nematodes typically have only one testis, which is the primary reproductive organ responsible for sperm production.

🔑Key Points:
(a) Monodelphic: This term refers to having a single gonad.
(c) Didelphic: This term refers to having two gonads. This is more common in female nematodes, which may have two ovaries.