**Core Concept**
The management of burn patients involves fluid resuscitation to maintain adequate circulation and prevent organ dysfunction. Various formulas have been proposed to calculate the amount of fluid required to replace the estimated losses in burn patients. These formulas take into account the percentage of total body surface area (TBSA) burned and the patient's weight.

**Why the Correct Answer is Right**
The **Parkland regime** and **Evan's formula** are two well-established formulas used to calculate fluid replacement in burn patients. The **Parkland regime** involves administering 4 mL/kg/%TBSA burned of lactated Ringer's solution over the first 24 hours, with half the calculated volume given in the first 8 hours. **Evan's formula** is similar, but it uses a more complex calculation to estimate fluid requirements based on the patient's weight and the percentage of TBSA burned. In contrast, the **Holiday Segar formula** is not a recognized formula for fluid replacement in burn patients.

**Why Each Wrong Option is Incorrect**
**Option A:** The **Brooke formula** is actually used to calculate the maintenance fluid requirements in children, not fluid replacement in burn patients.
**Option B:** While **Evan's formula** is not as widely used as the Parkland regime, it is still a recognized formula for fluid replacement in burn patients, unlike the Holiday Segar formula.
**Option C:** The **Parkland regime** is a well-established and widely used formula for fluid replacement in burn patients.

**Clinical Pearl / High-Yield Fact**
When calculating fluid replacement in burn patients, it's essential to remember that the goal is to maintain adequate circulation and prevent organ dysfunction. The Parkland regime and Evan's formula provide a framework for estimating fluid requirements, but clinical judgment and monitoring of the patient's response are also crucial.

**✓ Correct Answer: D. Holiday segar formula. This formula is not used for fluid replacement in burn patients.**