Assertion (A): Water boiling at `100^(@)C` at `1` atmospheric pressure in a beaker is not at equilibrium.
Reason (R ): If refers to an open system.
A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not a correct explanation of A.
C. A is true but R is false
D. A is false but R is true.
