Concept:Identifying a class of Arthropoda requires either named classes I–IV or a diagram showing their features.
The question is unanswerable when that information is absent.
Explanation:The given material lists only the options I, II, III, and IV.
It does not provide the names, descriptions, or labelled diagrams of the four classes of Arthropoda.
The actual instruction that uses these classes is also missing.
Without knowing what feature or organism must be matched to a class, no option can be judged as correct.
Any selection would be an uninformed guess rather than a reasoned biological answer.
A complete question should normally show the classes or their characteristic features before asking for an identification.
Answer:The correct option cannot be determined because the question is incomplete.