Which exit is used for normal boarding and deplaning on the CRJ 200?

The main exit used for normal boarding and deplaning on the CRJ 200 is the MCD, which stands for Main Cabin Door. This door is designed to be accessible and user-friendly for passengers, facilitating an efficient boarding and deplaning process. It is located at the front of the aircraft, allowing easy access to the main cabin area where passengers are seated.

While the other options serve specific purposes, they are not intended for regular passenger use. The GSD, or Galley Service Door, is primarily for service personnel and is not typically used by passengers for boarding or deplaning. Emergency exits are used in case of an emergency evacuation and are equipped with slides for rapid exit, rather than for regular passenger access. The crew escape hatch is meant solely for crew use in emergency situations and is not accessible to passengers. Therefore, the MCD is the correct and designated door for normal operations involving passenger movement.