Refer to figures.
NDBs can be used for holds and approaches. If you look at the figures, they show three different holds and approaches designed around an NDB. The approaches have different requirements; some are timed outbound legs, some are DME distances, one has a procedure turn, but all the holds have the same features - an outbound leg that is the reciprocal of the inbound leg. A hold is the same no matter which navigation aid it uses for a fix.

• QDM - magnetic bearing TO the station
• QDR - magnetic bearing FROM the station

ADFs show a magnetic bearing, so to fly a hold using an NDB you simply fly a magnetic bearing from the station for the outbound leg for the required time (1 minute or 1.5 minutes depending on altitude) and then turn 180° to fly a magnetic bearing to the station. Holds can also be flown using a DME distance instead of time.

This question specifically says you do not have DME, so you must use timing. For that reason also, you can discount any answer that mentions DME or distance - the question says you do not have that option. The only options left are:

Maintain a QDM to the station and upon crossing overhead, turn outbound and re-intercept the same QDM --> INCORRECT. QDM is indeed a bearing to the station, however the rest of the answer makes no sense - you cannot turn away from the station and intercept a bearing towards the station.

Fly a QDR from the station, and after a specified time, turn to intercept and fly the reciprocal QDM inbound --> CORRECT.

Note: This question has been developed from incomplete feedback. Any updates on the wording of the incorrect answers would be much appreciated.