Ayaan tested the nature of a few common substances with phenolphthalein indicator and summarised the results in the following table
Test tube |
Colour change with phenolphthalein indicator |
1 |
Colourless |
2 |
Pink |
3 |
Colourless |
4 |
Pink |
Which of the following substances could be present in test tubes 1, 2, 3 and 4?