Looking at the options:

1. Aircraft-specific checklist --> CORRECT. The operator will provide a checklist for crew use, that is specific to the aircraft type.

2. Actions in the event of discovery of a bomb --> CORRECT. In-flight, any suspicious device may be moved to the LRBL: Least Risk Bomb Location. This location provides the best chance of survival in the event of detonation while in the air.

3. Removal procedures for suspicious articles --> INCORRECT. The crew will not remove the suspicious article from the aircraft. On the ground, the device will be dealt with by specialist personnel.

4. Procedures around inspecting aeroplanes for concealed weapons, explosives or other dangerous devices. --> CORRECT. See below from ICAO annex 17 for more details.

5.Coordination with local law enforcement --> INCORRECT. If a security search is required in coordination with local law enforcement, then this will be handled by the operator with specialised staff.

6. Information on the least-risk bomb location --> CORRECT. See below from ICAO annex 17 for more details.

ICAO Annex 17
Chapter 13. Security
13.3 Aeroplane search procedure checklist

The operator shall ensure that there is on board a checklist of the procedures to be followed in searching for a bomb in case of suspected sabotage and for inspecting aeroplanes for concealed weapons, explosives or other dangerous devices when a well-founded suspicion exists that the aeroplane may be the object of an act of unlawful interference. The checklist shall be supported by guidance on the appropriate course of action to be taken should a bomb or suspicious object be found and information on the least-risk bomb location specific to the aeroplane.