Pterostigma is present in

Answer: Option D

Pterostigma is present in Odonata, Psocoptera and Raphidioptera.
The pterostigma is a group of specialized cells in the outer wings of insects, which are often thickened or coloured, and thus stand out from other cells.
The pterostigma is common among the insect orders Odonata, Neuroptera, Psocoptera, Hemiptera and Hymenoptera. It is particularly noticeable in dragonflies, but present also in other insect groups, such as snakeflies and megalopterans.