Okay, let's tackle this question. The patient has an abdominal injury with peritonitis and shock. The first step was securing airway and breathing, then IV fluids with two large bore cannulas. The next step is crucial here.

Abdominal injury leading to peritonitis and shock usually means there's internal bleeding or a ruptured organ. Peritonitis can be due to a perforated viscus, like the stomach or intestines. Shock in this context is likely hypovolemic from blood loss or septic from infection.

After initial stabilization (ABCs and IV fluids), the next step would be to identify and control the source of the problem. So, in a trauma setting, especially with peritonitis and shock, the standard approach is to take the patient to the operating room for exploratory laparotomy. This allows direct visualization and repair of any injuries.

Looking at the options, the correct answer should be immediate surgical intervention. The other options might include things like imaging (CT scan), which could delay necessary surgery, or antibiotics, which treat infection but don't address the underlying cause like a ruptured organ. Blood transfusion might be part of management but isn't the next step after initial resuscitation.

So the core concept here is the management of acute abdomen in trauma. The key is that once initial resuscitation is done, surgical intervention is needed. The wrong options are either delaying surgery or not addressing the source of the problem.

**Core Concept**
This question tests the management of a trauma patient with peritonitis and shock. The core principle is the **ABC (Airway, Breathing, Circulation) approach followed by rapid surgical intervention** for suspected intra-abdominal hemorrhage or viscus perforation. Peritonitis and shock in trauma often indicate a **hemorrhagic or septic source requiring immediate laparotomy**.

**Why the Correct Answer is Right**
The correct answer is **exploratory laparotomy**. After securing the airway, breathing, and initiating IV fluids, the next step in a trauma patient with peritonitis and shock is **urgent surgical exploration** to control bleeding (e.g., liver/splenic laceration) or repair a perforated viscus (e.g., bowel rupture). Peritonitis with shock is a surgical emergency; delays risk exsanguination or septic shock. Laparotomy allows direct visualization and intervention.

**Why Each Wrong Option is Incorrect**
**Option A:** *CT scan of the abdomen* delays definitive treatment. In unstable trauma patients, CT is contraindicated due to time constraints and risk of further decompensation.
**Option B:** *Broad-spectrum antibiotics* alone address sepsis but not the source of peritonitis (e.g., a perforated viscus). They are adjuncts, not the primary intervention.
**Option D:** *Blood transfusion* may be part of resuscitation but does not address the underlying cause of shock (e.g., uncontrolled hemorrhage).

**Clinical Pearl / High-Yield Fact**
**"Peritonitis + shock = laparotomy."** In trauma, peritonitis with hemodynamic instability is a classic indication for **immediate surgical exploration**. Remember: **"When in doubt, go to OT"** for unstable abdominal trauma patients. CT is reserved for hemodynamically stable patients.

✓ Correct Answer: B. Exploratory Laparotomy under general anesthesia