This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Prostate and seminal vesicles, Subject name: Surgery
Fructose absence in semen analysis suggests: 
Select and explain. 
A. Bilateral vas deferens obstruction, B. Seminal vesicles agenesis, C. Testicular failure, D. Prostatic urethral obstruction
B: Seminal vesicles agenesis
Answer: B: Seminal vesicles agenesis 
Explanation: Abnormalities Low ejaculate volume may indicate: Retrograde ejaculation Ejaculatory duct obstruction Incomplete collection Androgen deficiency Azoospermia: Testicular failure Obstruction of vas deferens Absence of fructose: Seminal vesicle agenesis or obstruction