Q: 45 (NDA-I/2016)

Suppose you have four test tubes labelled as ‘A’, .‘B’, ‘C’ and T) ‘A’ contains plain water, ‘B’ contains solution of an alkali, ‘C* contains solution of an acid, and ‘D’ contains solution of sodium chloride.
Which one of these solutions will turn phenolphthalein solution pink ?

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