Automation System
VLSI (very large scale integrated circuits) logic:

All of these
will not be available in this decade
None of these
will result in lower cost, higher capability electronic equipment
means more costly electronic products in the future

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Automation System
D/A (digital to analog) conversion:

None of these
results in a binary code as the final output
both (b) and (c)
has to be sampled at 1/2 the highest input frequency
must be fed through a filter to reproduce the original signal accurately

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