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Major modification required to produce temperature of - 200?C in a vapour compression refrigeration system using Freon 12 as refrigerant, is

[A].	Size of compressor required would be large to handle volumes of vapour	[B].	Compression ratio has to be restricted till stronger body of compressor is needed
[C].	Condenser capacity must be increased to handle the refrigerant	[D].	Insulation should be capable of withstanding such low temperatures
[E].	Freon 12 cannot be used for such low temperatures

Answer: Option E