Consider the following :1.Carabid beetles2.Centipedes3.Flies4.Termites5.Wasps Parasitoid species are foundhow many of the above kind of organisms?

1. A

   Only two

   Only two. Parasitoids occur in more of the list.

2. B

   Only three

   Only three. Flies, wasps and some beetles include parasitoids; centipedes and termites are not parasitoid groups here.

3. C

   Only four

   Only four. Over-counts.

4. D

   All Five

   All five. Centipedes are predators; termites are social decomposers, not parasitoids.

Summary. Official key is (b) only three. Parasitoids — insects whose larvae live in or on a host and kill it — are classic among wasps (Ichneumonoidea, Chalcidoidea), flies (Tachinidae) and some beetles (e.g. certain Carabidae / ripiphorids in the broader parasitoid story UPSC counts as three). Centipedes are predators; termites are not parasitoids. The paper keys three of the five kinds.