The correct answer is A. ACC2.
ACC2 is the form that shall be used by GDR when a person falls out of train injured or killed. It is a mandatory form that must be completed and submitted to the relevant authorities within 24 hours of the incident. The form includes information about the incident, such as the date, time, and location, as well as the identity of the person who fell out of the train. It also includes information about the injuries or death, such as the cause of death or the severity of the injuries.
ACC3 is a form that is used to report a train accident. It is not specific to incidents involving people falling out of trains. ACC4 is a form that is used to report a train derailment. It is also not specific to incidents involving people falling out of trains.
It is important to complete ACC2 accurately and in a timely manner. This will help to ensure that the relevant authorities are able to investigate the incident and take appropriate action.