Correct answer: D. A saliva sample.
If a driver is stopped at a roadside check, they should be aware that, along with the impairment test, Gardaí can also request a saliva sample if they suspect the driver is driving under the influence of drugs.
This is an official-style question from the Safe and Responsible Driving topic of the Ireland driver theory test (Cat. B). Practise all 807 questions free on iTest.ie — with timed mock exams, automatic mistake tracking and progress sync across devices.
Practise the full question bank free →