Aviation and Airport Security Practice Test.

The Irish Army Ranger Wing is the Irish Special Forces and serves as the main counterterrorism unit for Ireland. Option B, the GIGN, is the French Special Forces and is not a representation of the Irish counterterrorism unit. Option C, the GEO, is the Special Operations and Counterterrorism Unit for Greece and is not related to Ireland. Option D, the Border Guard Force, is a border patrol agency and is not a representation of a counterterrorism unit. Therefore, the correct and only answer to this question is option A, the Irish Army Ranger Wing.