Consider the diagram below and choose the correct option regarding the structures (a-d).

• A

  a	b	c	d
  Colleterial gland	Vas deferens	Ejaculatory duct	Anal cercus

• Correct answer
  B

  a	b	c	d
  Phallic gland	Vas deferens	Ejaculatory duct	Anal cercus

• C

  a	b	c	d
  Phallic gland	Ejaculatory deferens	Vas duct	Caudal style

• D

  a	b	c	d
  Phallic gland	Vas deferens	Ejaculatory duct	Titilator

Solution

The diagram given above is of the male reproductive system of cockroach. The labelled structures are phallic gland, vas deferens, ejaculatory duct, and anal cercus.

Hence, the correct answer is option: 'B'.