Question

The gynovalvular plates in female cockroach are modification of

• A. $7^{th}$ tergum
• B. $7^{th}$ sternum
• C. $8^{th}$ Tergum
• D. 8 sternum

Answer 1

The correct option is B $7^{th}$ sternum

Arthropods have segmented body. The 7${}^{th}$ sternum of female cockroach encloses a big space, called oothecal chamber or gynovalvular plates where ootheca is formed.
So, the correct answer is option B.