Excretion in cockroach takes place by

Give scientific reasons: In cockroach,a well-developed respiratory system is seen.

Match List-$I$ with List-$II$ related to the digestive system of a cockroach.

List-$I$	List-$II$
$A$. The structures used for storing of food	$I$. Gizzard
$B$. Ring of $6-8$ blind tubules at junction of foregut and midgut.	$II$. Gastric Caeca
$C$. Ring of $100-150$ yellow coloured thin filaments at junction of midgut and hindgut.	$III$. Malpighian tubules
$D$. The structures used for grinding the food.	$IV$. Crop

Choose the correct answer from the options given below:

Answer in one word or one line. What is the position of ovaries in the cockroach?

Which of the following statement$(s)$ is/are correct regarding the respiratory system of a cockroach?
$(i)$ It consists of a network of trachea that open through $12$ pairs of small holes called spiracles present on the lateral side of the body.
$(ii)$ Thin branching tubes carry oxygen from the air to all the parts.
$(iii)$ The opening of the spiracles is regulated by sphincters.
$(iv)$ Exchange of gases takes place at the tracheoles by diffusion.

Identify the odd one out.