A 34-Year-Old Man Was Suffering from Postoperative Retention of Urine

A 34-year-old man was suffering from postoperative retention of urine after an appendectomy. The patient's urinary tract was otherwise normal. Because the patient was in considerable discomfort, the resident decided to pass a catheter.
-The following statements concerning the catheterization of a male patient are correct except which?

A) Because the external urethral orifice is the narrowest part of the urethra, once the tip of the catheter has passed this point, further passage should be easy.
B) Near the posterior end of the fossa terminalis, a fold of mucous membrane projects from the roof and may catch the end of the catheter.
C) The membranous part of the urethra is narrow and fixed and may produce some resistance to the passage of the catheter.
D) The prostatic part of the urethra is the widest and most easily dilated part of the urethra and should cause no difficulty to the passage of the catheter.
E) The bladder neck is surrounded by the sphincter vesicae and always strongly resists the passage of the tip of the catheter.