Easy
Which colour is given by Phenolphthalein in basic medium?
Explanation
Explanation
Phenolphthalein is an indicator that stays colourless in acidic or neutral solutions but turns pink (magenta) as soon as it's added to a basic (alkaline) solution. So the correct answer is Pink, option (1).
PRO TIP
Re-check your working by substituting the answer back into the original question.