Which pharmaceutical product innovation first made widespread pain-free surgery possible, revolutionizing medical practice in the 1840s?

The evolution of medical products has dramatically transformed healthcare outcomes over the centuries. Surgical procedures that were once dangerous and often fatal have become routine thanks to key innovations in medical technology and pharmaceuticals. This question focuses on one of the most significant product innovations that revolutionized surgical practice and saved countless lives. Test your knowledge of this pivotal moment in medical product history!

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Ether anesthesia, first publicly demonstrated at Massachusetts General Hospital in 1846
Aspirin, developed by Bayer in 1897 as the first mass-produced analgesic
Morphine, isolated from opium in 1803 and first commercially produced in the 1820s
Nitrous oxide, first used for dental extractions in 1844 but not widely adopted for major surgery