Select the correct position of testis in Periplaneta americana.

Options

1. A$7^{\text{th }}, 8^{\text{th }}, 9^{\text{th }}$ abdominal segments
2. B$4^{\text{th }}, 5^{\text{th }}, 6^{\text{th }}$ abdominal segments
3. C$8^{\text{th }}, 9^{\text{th }}, 10^{\text{th }}$ abdominal segments
4. D$5^{\text{th }}, 6^{\text{th }}, 7^{\text{th }}$ abdominal segments