Which one is wrong about the prostate?
A、It is a chestnut-shaped organ. 
B、It may be divided into anterior, middle, posterior and two lateral lobes.
C、The urethra passes through the middle lobe of the gland.
D、There is prostatic sulcus along the middle line on the posterior surface.
E、The ejaculatory duct penetrates the base and opens on seminal colliculus.