A) Zeolites are used as ion exchangers in softening of hard water.
B) ZSM-5 used to convert gasoline into alcohol.
C) Zeolites are used as catalysts in cracking of hydrocarbons.
D) Zeolites can act as molecular sieves.
Identify the correct statement.

Zeolites are widely used as catalysts in the petrochemical industry in cracking of hydrocarbons.

Zeolites are used as ion-exchange beds in water purification, softening. 

Zeolite used in the petroleum industry is ZSM-5. It converts alcohol directly into gasoline (petrol).

Zeolites are used to separate molecules (only molecules of certain sizes and shapes can pass through), and as traps for molecules so they can be analyzed.  Zeolites are also used as catalysts and sorbents. Thus, they can act as Molecular sieves.