Explanation
The correct answer is B: Colleterial gland.
In cockroaches, the ootheca is a protective casing that contains the eggs. It is produced by the female reproductive system, specifically by the secretion of the colleterial gland.
The colleterial gland is a type of accessory gland found in female insects that produces a sticky substance. In cockroaches, this substance is used to form the ootheca, which protects the eggs from desiccation and predators.
The other glands mentioned - phallic gland, conglobate gland, and mushroom gland - are also found in male and female cockroaches, but they do not produce the ootheca. The phallic gland produces the spermatophore, which is the package of sperm that is transferred to the female during mating. The conglobate gland produces defensive secretions that deter predators, while the mushroom gland produces a sticky, adhesive substance that is used for climbing and sticking to surfaces.
