A compound ‘\( X \)’ when treated with phthalic anhydride in presence of concentrated \( \mathrm{H_2SO_4} \) yields ‘\( Y \)’. ‘\( Y \)’ is used as an acid base indicator.‘\( X \)’ and ‘\( Y \)’ are respectively.
Carbolic acid, Phenolphthalein
Toludine, Phenolphthalein
Anisole, methyl orange
Salicylaldehyde, Phenolphthalein