Which of the following are the sub-groups of Petrochemical Industries:
1. Polymers 
2. Synthetic fibres 
3. Elastomers 
4. Surfactant intermediate 
Select the correct answer using the code given below?

Petrochemical Industries has been growing very fast in India. A variety of products come under this category of industries. In 1960s, demand for organic chemicals increased so fast that it became difficult to meet this demand. At that time, petroleum refining industry expanded rapidly. This group of industries is divided into four sub-groups: (i) polymers, (ii) synthetic fibres, (iii) elastomers, and (iv) surfactant intermediate. Mumbai is the hub of the petrochemical 

By: ANIVESH KUMAR