Sentence Correction (SC) | Re: Perhaps the most significant medical breakthrough of the twenties

]Perhaps the most significant medical breakthrough of the twenties, the real story behind the isolation of insulin was not revealed for over fifty years .

A)Perhaps the most significant medical breakthrough of the twenties, the real story behind the isolation of insulin was not revealed for over fifty years.
the first part "perhaps ..... twenties" should modify "isolation of insulin" but here it is modifying "the real story...."
B)The real story behind the isolation
...

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