Which of these scientific instruments, first commercialized in the 1950s, revolutionized chemical analysis by allowing scientists to identify compounds through their mass-to-charge ratios?

Product innovation has dramatically transformed scientific research and development throughout history. Among the countless scientific instruments developed over centuries, some have had revolutionary impacts on the field. This trivia question focuses on a groundbreaking invention that fundamentally changed how scientists analyze chemical substances, leading to countless discoveries across chemistry, biology, medicine, and environmental science.

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Gas Chromatography-Mass Spectrometry (GC-MS)
Scanning Electron Microscope (SEM)
Nuclear Magnetic Resonance (NMR) Spectroscopy
X-Ray Diffraction Machine (XRD)