Q. Consider the following chemicals
1. Benzene
2. Carbon tetrachloride
3. Sodium carbonate
4. Trichloroethylene
Which of the above is/are used as dry cleaning chemical?

• (A) 1, 2 and 4 only
• (B) Only 1
• (C) Only 2
• (D) 1, 2, 3 and 4