Which of the following products is not obtained from petroleum? 

Coke 

The correct answer is option 1. Coke.

Here is an explanation for each product:

1. Coke:  Coke is a solid carbonaceous material that is obtained from coal, not directly from petroleum. It is produced through a process called coking, where coal is heated in the absence of air to remove volatile components, leaving behind a porous carbon residue.

2. Diesel:  Diesel is a fuel obtained from petroleum through a refining process. It is a distillate product derived from crude oil and is commonly used as a fuel for diesel engines.

3. Paraffin wax:  Paraffin wax is obtained from petroleum through the refining process. It is a white or colorless soft solid that is often used in candles, cosmetics, and various other applications.

4. Lubricating oil: Lubricating oil, also known as motor oil, is derived from petroleum during the refining process. It is used to lubricate and cool moving parts in engines and machinery to reduce friction and wear.

In summary, while coke is derived from coal, diesel, paraffin wax, and lubricating oil are products obtained from the refining of petroleum.