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Its a question in matrix match-Chem-Paper-I.
The reaction that was asked in column 1, is shown in the figure.
The corresponding matches as given in the solution were-
Free Radical
Carbene.
There is no role of free radical in this reaction. Its a simple Carbene reaction. Those who know how to do this reaction with free radical, PLZ post the mechanism.
I promise 3 salutes.