Question: The relation between input x [ n ] and output y [ n ] for an LTI system with impulse response h [ n ]

The relation between input x[n] and output y[n] for an LTI system with impulse response h[n] in time domain is defined by the convolution as
y[n]= x[n]* y[n], where * denotes the convolution operation.
Which of the following defines the relation between the DTFT of each variable?

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