Assertion (A) : Large cold storage plants use ammonia as

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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 pressure
Codes

1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true but T is not the correct explanation of A
3. A is true but R is false
4. A is false but R is true

Correct Option: A

NA