Which combination correctly matches refrigerant type with example?

• A. CFC: R-11; HCFC: R-22; Natural: R-290
• B. CFC: R-12; HCFC: R-22; Natural: R-134a
• C. CFC: R-22; HCFC: R-143a; Natural: R-744
• D. CFC: R-404A; HCFC: R-410A; Natural: R-32

Answer: (A)

Different refrigerant types are classified by their ozone depletion potential and their chemistry. CFCs contain chlorine and are ozone-depleting; HCFCs also contain chlorine but are less harmful and are being phased out. Natural refrigerants include hydrocarbons, CO2, and ammonia, often with zero or very low ozone depletion potential.

So the correct match is: a CFC mapped to R-11, an HCFC mapped to R-22, and a Natural refrigerant mapped to R-290. R-11 is a classic CFC, R-22 is an HCFC, and R-290 is a natural hydrocarbon refrigerant (propane).

Other options misclassify: R-134a is an HFC, not a Natural refrigerant; R-404A, R-410A, and R-32 are HFC blends, not CFCs, HCFCs, or Natural refrigerants, and sometimes R-22 is placed with CFCs even though it’s an HCFC.