Which of the following lists the component parts of the Type IV connector link?

• A. Base plate, 1 aluminium roller, 1 locking plate
• B. Base plate, 2 aluminium rollers, 2 locking plates
• C. Base plate, 2 aluminium rollers, 1 locking plate
• D. Base plate, 3 aluminium rollers, 1 locking plate

Answer: (C)

The key idea here is knowing the exact parts and how they fit together in a Type IV connector link. This setup uses a base plate for mounting support, two aluminium rollers to provide smooth guidance and alignment, and a single locking plate to secure the assembly. This combination delivers stable control and a reliable lock without adding extra parts that could interfere with movement. If there were only one roller, guidance would be insufficient; two locking plates would over-constrain the link; and a third roller would change how the link moves and isn’t how this design is intended to function. So the configuration with a base plate, two aluminium rollers, and one locking plate matches the intended design.