Suppose you have four test tubes labelled as ‘A’, ‘B’, ‘C’, and ' $D$ '. ' $A$ ' 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?

• A

  Solution ‘A’
• Correct answer
  B

  Solution ‘B’
• C

  Solution ‘C’
• D

  Solution ‘D’

Hence, the correct answer is option: 'B'.