R-12 is generally preferred over R-22 in deep freezers since

1.	R-12 is generally preferred over R-22 in deep freezers since
A.	It has low operating pressures
B.	It gives higher coefficient of performance
C.	It is miscible with oil over large range of temperatures
D.	All of the above
Answer» D. All of the above

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R-12 is generally preferred over R-22 in deep freezers since

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