AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
(B) Assam
Assam is the oldest oil-producing state of India. Digboi, Naharkatiya, and Moran-Hugrijan are its important oil fields.
Source: Conventional Sources of Energy (Petroleum), Chapter 5
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The textbook explicitly states: "Assam is the oldest oil producing state of India. Digboi, Naharkatiya and Moran-Hugrijan are the important oil fields in the state." Examiners expect you to recall this direct factual statement. Mumbai High and Ankeleshwar (Gujarat) are also major petroleum areas, but neither is the oldest producing state — that distinction belongs to Assam.