A noise level of 100 decibels would correspond to

A level of 100 dB is far above everyday sounds like ordinary conversation (~60 dB) and is in the range of loud industrial or workshop noise. Sound is measured in decibels (dB), and exposures above about 75 dB can begin to damage hearing with prolonged exposure [1]. Decibel charts and occupational guidance place tools and industrial sources well above conversational levels; typical machine-shop or industrial tool noise commonly reaches or exceeds ~100 dB, and regulatory charts treat 100 dB as a high level requiring limited exposure time and hearing protection [2]. Therefore, the best match among the choices is noise from a machine-shop (option 4).

Sources

1. [1] Environment, Shankar IAS Acedemy .(ed 10th) > Chapter 5: Environmental Pollution > 5.7. NOISE POI,LUTION > p. 80
2. [2] https://www.hearingconservation.org/assets/Decibel.pdf