Q. Which of the following organisms is useful for us?
A) $Musca$
B) $Bombyx$
C) $Pheretima$
D) $Periplaneta$
Explanation
The correct answer is Option B: $Bombyx$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.