Test-tubes X, Y and Z each hold a small volume of water. A little $\text{NaCl}$ is then put into test-tube X. A little $\text{SiCl}_4$ is then put into test-tube Y. A little $\text{AlCl}_3$ is then put into test-tube Z. After a brief interval, two drops of Universal Indicator solution are placed into each test-tube. Which observations are seen?
- A1, 2 and 3 are correct
- B1 and 2 only are correct
- C2 and 3 only are correct
- D1 only is correct