The nearest correct option is A . The thing to be rembered is percentage of cases with surgical exploration in cases of renal trauma is very less The vast majority of cases of blunt renal trauma can be treated conservatively and in one major series only 2.5% of such cases required surgical exploration. Most penetrating injuries from knife or gunshot wounds require renal exploration. ( ref : Bailey 27 th edition , chapter 76 , pg no : 1414 ) Urinary extravasation alone from a grade IV parenchymal laceration or forniceal rupture can be managed nonoperatively with an expectation of spontaneous resolution of more than 90%. Should nonble tissue constitute more than 25% in association with a parenchymal laceration, urinary extravasation, or both, the potential for complications greatly increases and operative management may be considered ( ref : Bailey 27th ed , chapter 50 , pg no 1153 )