Is the airbag effective if the vehicle's occupants do not use the seatbelt?

A)Yes, but only for the driver.
B)Yes.
C)No, and it can cause serious injuries.Correct
The airbag is a very safe passive safety system but, to avoid adverse effects, we must bear in mind the following:
- It is a complement to the seatbelt, so they must always be used together.
- It is advisable for the airbag to be approximately 25 cm from the body and never less than 10 cm away.
- We should avoid placing objects near the airbag or resting legs on the dashboard. When the airbag deploys, very serious injuries could occur.
- When using a rearward-facing child restraint device in a seat with an airbag, we must deactivate it.