Under optimal conditions of the process the temperatures

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Under optimal conditions of the process the temperatures experienced by a copper work piece in fusion welding, brazing and soldering are such that

1. T_welding > T_soldering > T_brazing
2. T_soldering > T_welding > T_brazing
3. T_brazing > T_welding > T_soldering
4. T_welding > T_brazing > T_soldering

Correct Option: D

Temp of Brazing > 450°C
Temp of soldering < 450°C