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Identify the incorrect statement

[A].	Fatigue strength is seriously reduced by the introduction of a stress raiser such as a notch or hole	[B].	A fatigue failure is particularly insidous, because it occurs without any warning
[C].	Fatuge results in a brittle fracture with no gross deformation at the fracture	[D].	As the roughness of surface increses the fatigue life of speoimen increases
[E].	None of the above

Answer: Option D