1. Carbon monoxide can be detected by means of carbon monoxide detectors, __________, or by chemical analysis.
  1. flame safety lamp
  2. white mice
  3. oxygen detectors
  4. multi-gas detectors
Correct!  The correct answer is D. multi-gas detectors.
Statement No. 2:  Carbon monoxide can be detected by means of carbon monoxide detectors, multi-gas detectors, or by chemical analysis.