Acids, Bases and Salts

Boojho, Paheli and their friend Golu were provided with a test
tube each containing China rose solution which was pink in
colour. Boojho added two drops of solution ‘A’ in his test tube
and got dark pink colour. Paheli added 2 drops of solution ‘B’
to her test tube and got green colour. Golu added 2 drops of
solution ‘C’ but could not get any change in colour. Suggest
the possible cause for the variation in their results.