Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason \(R\). Assertion \(A\) :Phenolphthalein is a \(pH\) dependent indicator, remains colourless in acidic solution and gives pink colour in basic medium Reason \(R\) : Phenolphthalein is a weak acid. It doesn't dissociate in basic medium. In the light of the above statements, choose the most appropriate answer from the options given below.

1. A Both \(A\) and \(R\) are true and \(R\) is the correct explanation of \(A\)
2. B Both \(A\) and \(R\) are true but \(R\) is NOT the correct explanation of \(A\).
3. C \(A\) is false but \(R\) is true
4. D \(A\) is true but \(R\) is false