( a ) seminal vesicle, urinary bladder, bulbourethral gland, prostate, urethra, glans *****
( b ) urinary bladder, seminal vesicle, bulbourethral gland, prostate, urethra, foreskin
( c ) seminal vesicle, urinary bladder, prostate, bulbourethral gland, urethra, glans *****
( d ) urinary bladder, seminal vesicle, prostate, bulbourethral gland, urethra, foreskin