Following is an example for secondarily wingless insect

A. Blister beetle

B. Head louse

C. Collembolan

D. Silver fish

Answer: Option B

Solution(By Examveda Team)

Secondarily wingless insect is Head louse.
Head lice are wingless insects that spend their entire lives on the human scalp and feed exclusively on human blood.
Adult head lice are small (2.5 - 3 mm long), dorsoventrally flattened (see anatomical terms of location), and wingless.