When a few drop os phenolphthalein indicator were added to the solution of some compound 'A', the solution became pink. What does it indicate ?

A drop of phenolphthalein is added to the solution of lime water

If pH of the solution is 13 then what does it indicate?

When a few drops of universal indicator were added to a dilute solution of HCl, it is observed that the colour of the solution changes from

When a few drops of universal indicator were added to a dilute solution of HCl, it is observed that the colour of the solution changes from

The colour of phenolphthalein indicator in basic solution is

A few drops of phenolphthalein indictor were added to an unknown solution A. It scquired pink colour Now another unknown solution B was added to it dropwise and the solution ultimately because colourless. Predict the nature of the solution A and B.