Assertion (A) : Large cold storage plants use ammonia as refrigerant. While domestic refrigerators use chlorofluorocarbons.Reason (R) : Ammonia can be liquified at ambient temperature and low pressureCodes

• A. Both A and R are true and R is the correct explanation of A
• B. Both A and R are true but T is not the correct explanation of A
• C. A is true but R is false
• D. A is false but R is true