Step 1: Understanding the Question:
This question tests knowledge of insect metamorphosis.
Step 2: Detailed Explanation:
Incomplete metamorphosis (hemimetabolism) has three stages: egg, nymph, and adult.
Hemiptera (true bugs) and Orthoptera (grasshoppers) show incomplete metamorphosis.
Coleoptera (A): Complete metamorphosis.
Hymenoptera (A): Complete metamorphosis.
Psocoptera (C): Incomplete, but Lepidoptera has complete.
Odonata (D): Incomplete, but Ephemeroptera has incomplete.
Thus, Hemiptera and Orthoptera show incomplete metamorphosis.
Step 3: Final Answer:
Thus, incomplete metamorphosis is seen in Hemiptera and Orthoptera, which corresponds to option (B).
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