Final answer:
The preferred fixation device for a femoral neck fracture is a Cannulated screw. It allows for a minimally invasive approach and precise placement, making it the standard option for stabilizing this type of fracture.
Step-by-step explanation:
The fixation device indicated for a femoral neck fracture is B. Cannulated screw. This type of fixation is commonly used because it allows for minimally invasive surgery and can be precisely placed to stabilize the fracture. The cannulated screws are inserted percutaneously and are designed to fit inside a guide wire which helps in the accurate placement of the screws into the femoral neck. Other options like an intramedullary rod, gamma nail, or Kirschner wire can also be used in different situations or types of femoral fractures, but for femoral neck fractures specifically, the cannulated screw is generally the preferred method of fixation.