**Core Concept**
Burns management involves fluid resuscitation to maintain tissue perfusion and prevent hypovolemic shock. The choice of fluid is critical in this process, as it affects the patient's hemodynamic stability and outcomes.

**Why the Correct Answer is Right**
Blood is not the first choice for fluid resuscitation in burns due to its high viscosity, which can cause increased vascular resistance and worsen shock. Additionally, blood is rich in clotting factors, which can lead to thrombosis and further complications. In the context of burns, the primary goal is to maintain perfusion and prevent tissue ischemia, and blood does not provide the necessary colloidal osmotic pressure to achieve this. In contrast, crystalloids like normal saline and Ringer lactate are more effective in expanding plasma volume and maintaining tissue perfusion.

**Why Each Wrong Option is Incorrect**
**Option A:** Normal saline is a commonly used fluid for burns resuscitation due to its isotonic nature and lack of sodium load. It helps to expand plasma volume and maintain tissue perfusion, making it a useful choice in this context.
**Option C:** Dextran is a colloid solution that can help to expand plasma volume and improve microcirculatory flow. While it may have some limitations, it is a more suitable choice than blood for fluid resuscitation in burns.
**Option D:** Ringer lactate is another commonly used fluid for burns resuscitation, providing a balanced solution of electrolytes and lactate. It helps to expand plasma volume and maintain tissue perfusion, making it a useful choice in this context.

**Clinical Pearl / High-Yield Fact**
In burns resuscitation, the Parkland formula is a commonly used guideline to calculate fluid requirements. It recommends 4 mL/kg/%TBSA (total body surface area) of lactated Ringer's solution over the first 24 hours, with half administered in the first 8 hours.

**✓ Correct Answer: B. Blood**