$27.$ Given: A facility is provided with a manual fire alarm system, carbon monoxide

alarms and a gas detection system. Which of the following is correct about the audible and visible alarm signals of these three systems?

a$.$ All three systems can share the same alarm signal because the goal is

evacuation of the building.

b$.$ The gas detection system can share alarm signals with the fire alarm

system because the released gas could result in fire.

c$.$ The gas detection system shall have a distinct alarm from the fire alarm

signal and carbon monoxide signal.

d$.$ There is no restriction as long as the facility has a Fire Safety and

Evacuation Plan and fire drills are practiced semi$-$annually.

Reference $\_\_\_\_\_\_\_\_\_\_$