Discussion
Assertion (A): A multimeter is a suitable instrument for testing an airbag deployment circuit.
Reason (R): An initiator can be fired by a current of a few milliamps through its bridge wire.
Select the correct answer from the options below.
Answer: D
The reason is correct and it is precisely why the assertion is dangerous: an ordinary meter's test current can deploy the bag. Only approved diagnostic equipment may be used on a deployment loop. Checking which component actually carries the load settles most questions of this kind at once. The order in which the effects act is what decides the outcome, so it is worth establishing first. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb.
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