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

Consider the following chemicals: [IAS Prelim] 1. Benzene 2. Carbon te

1.	Consider the following chemicals: [IAS Prelim] 1. Benzene 2. Carbon tetrachloride 3. Sodium carbonate 4. Trichloroethylene Which of the above/is are used as dry cleaning chemical?
A.	1 only
B.	2 only
C.	1, 2 and 4 only
D.	1, 2, 3 and 4
Answer» D. 1, 2, 3 and 4