Correct option is D
Signs of urethral injury (blood at meatus, scrotal ecchymosis, high-riding prostate) →
avoid urinary catheterization until urethrogram is done.
Explanation of options: (a) ✘ FAST is safe for intra-abdominal bleed detection. (b) ✘ Gastric tube insertion is not contraindicated. (c) ✘ IV fluids are life-saving in trauma. (d) ✔ Correct; catheterization contraindicated until urethral injury excluded.