Which of the following can cause frequent urination in patients with benign prostatic hyperplasia?
A. Irritation of the bladder and urethra
B. Incomplete emptying of the bladder
C. Increased ADH secretion
D. Impaired micturition reflex
E. Increased volume of dilute urine
2. Which of the following is a useful serum marker for the diagnosis of prostatic cancer?
A. Prostate-specific antigen
B. Follicle-stimulating hormone
C. Luteinizing hormone
D. Human chorionic gonadotropin