## Core Concept
The question pertains to the surgical management of Developmental Dysplasia of the Hip (DDH), specifically the sequence of steps during surgical intervention. Understanding the anatomical and surgical principles is crucial for the correct sequence.

## Why the Correct Answer is Right
The correct sequence involves:
1. **Locate the acetabulum by tracing ligament of teres**: This is an initial step to identify the location of the acetabulum, which is essential for further surgical maneuvers.
2. **Capsulotomy**: After locating the acetabulum, a capsulotomy is performed to access the joint.
3. **Relocate the femoral head in acetabulum**: With the joint accessed, the next logical step is to relocate the femoral head into the acetabulum.
4. **Derotation femoral osteotomy**: Finally, if necessary, a derotation femoral osteotomy may be performed to correct any femoral anteversion or malrotation.

This sequence makes anatomical and surgical sense, ensuring that each step logically follows the previous one.

## Why Each Wrong Option is Incorrect
- **Option A:** This option does not correctly sequence the steps as it does not start with locating the acetabulum, which is crucial for orientation.
- **Option B:** This option incorrectly places the derotation femoral osteotomy before relocating the femoral head, which does not make surgical sense.
- **Option D:** This option incorrectly sequences the initial steps, suggesting that capsulotomy should be done before locating the acetabulum, which could lead to difficulties in finding the correct anatomical location.

## Clinical Pearl / High-Yield Fact
A key point to remember in the surgical management of DDH is the importance of accurately identifying the acetabulum and the ligament of teres, which serves as a guide to the acetabular location. This is crucial for a successful surgical outcome.

## Correct Answer: B.