Concept:The question asks to find which place listed is not an oil field in India.Explanation:Naharkatiya is an oil field in Assam.Kalol is an oil field in Gujarat.Ankleshwar is an oil field in Gujarat.Ledo is a town in Tinsukia district, Assam, but it is not an oil field. It is known for its railway station.Thus, Ledo is the only option that is not an oil field.Answer:Ledo