When a tubelight breaks, a cracking sound is produced because ____?

When a tubelight breaks, a cracking sound is produced because ____?
[A]Pressure inside the lamp is less than atmospheric pressure
[B]Pressure inside the lamp is more than atmospheric pressure
[C]The lamp is filled with reactive gases
[D]The lamp is filled with mercury vapour

Pressure inside the lamp is less than atmospheric pressure
A fluorescent lamp tube is filled with a gas containing low pressure mercury vapor and argon, xenon, neon, or krypton. The pressure inside the lamp is around 0.3% of atmospheric pressure.

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