  The quantum to classical transition maybe caused by decoherence or by
dynamical collapse of the wave-function. We propose quantum discord as a tool,
1) for comparing and contrasting the role of a collapse model (Continuous
Spontaneous Localization) and various sources of decoherence (environmental and
fundamental), 2) for detecting collapse model and fundamental decoherence for
an experimentally demonstrated macroscopic entanglement. We discuss the
experimental times which will lead to the detection of either Continuous
Spontaneous Localization or fundamental decoherence. We further put bounds on
the collapse parameters from this experiment for quantum discord.
