This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen and pelvis, Subject name: Anatomy
Which of the following has fibromuscular stroma ? 
Select and explain. 
A. Testis, B. Liver, C. Prostate, D. Urinary bladder
C: Prostate
Answer: C: Prostate 
Explanation: The prostatic pa of the urethra develops from the pelvic (middle) pa of the urogenital sinus (endodermal origin). Endodermal outgrowths arise from the prostatic pa of the urethra and grow into the surrounding mesenchyme. The glandular epithelium of the prostate differentiates from these endodermal cells, and the associated mesenchyme differentiates into the dense stroma and the smooth muscle of the prostate. ref - BDC vol2 pg 376-378