Q: 75 (IAS/1998)

Commercial production of mineral oil has started recently in which one of the areas of India, labelled 1, 2, 3 and 4 in the rough map given below :
question_subject: 
Geography
question_year: 
1998
question_exam: 
IAS
question_sub_subject: 
Geography of India
question_topic: 
Minerals
stats: 
0,1208,2656,632,1112,912,1208