Which country is home to the world's largest oil refinery producing about 1.24 million barrels per day?

• A. United States
• B. India
• C. China
• D. Saudi Arabia

Answer: (B)

Refinery capacity and how we rank plants by nameplate size is what this question tests. The largest oil refinery in the world by total capacity is the Jamnagar complex in Gujarat, India, run by Reliance Industries. When you add together its East and West units, the combined capacity is about 1.24 million barrels per day, which exceeds the capacity of any other single refinery globally. That’s why the country is India. While there are other very large refineries elsewhere, none reach this level of combined output. Keep in mind that refinery capacities can change with expansions or reconfigurations, so rankings reflect the current snapshot.