Which is the prevalent indoor roach

• A. Asian
• B. German
• C. Brown Banded
• D. Australian

Answer: (B)

This question tests which cockroach species most commonly infests indoor spaces. The German cockroach is the most prevalent indoors because it is small, highly adaptable to warm, moist indoor environments—especially kitchens and bathrooms—and reproduces very quickly. It hides in tiny cracks and crevices, feeding on a wide range of food residues, which helps populations establish and grow fast in a home. Females can produce multiple egg cases, each holding several nymphs, leading to rapid population expansion from a small starting infestation. These traits make German cockroaches far more common inside than the other species. The Asian cockroach is mostly an outdoor invader that can enter buildings occasionally, brown-banded cockroaches prefer dry, higher indoor areas and are less common overall, and Australian cockroaches are typically outdoor dwellers in many regions.