Arrange the following oil refineries of Assam according to their location from the west to the east and choose the correct option.
I. Guwahati
II. Numaligarh
III. Bongaigaon
IV. Digboi
I. Guwahati
II. Numaligarh
III. Bongaigaon
IV. Digboi
Show Hint
Bongaigaon $\rightarrow$ Guwahati $\rightarrow$ Numaligarh $\rightarrow$ Digboi.
(Digboi is India's oldest operating oil refinery located in extreme East Assam).
- I, III, II, IV
- I, III, IV, II
- III, I, IV, II
- III, I, II, IV
The Correct Option is D
Solution and Explanation
• Assam is the oldest oil-producing state in India.
• Major oil refineries in Assam include Bongaigaon, Guwahati, Numaligarh, and Digboi.
• Mapping these from West to East requires knowledge of their administrative districts and geographical longitudes.
Step 1: Identify the westernmost refinery
Bongaigaon refinery (III) is located in Chirang/Bongaigaon district in Western Assam (Longitudinal location $\approx 90.5^\circ \text{ E}$).
Step 2: Identify the central-western refinery
Guwahati refinery (I) is located at Noonmati in Kamrup Metropolitan district (Longitudinal location $\approx 91.7^\circ \text{ E}$).
Step 3: Identify the central-eastern refinery
Numaligarh refinery (II) is located in Golaghat district of Upper Assam (Longitudinal location $\approx 93.8^\circ \text{ E}$).
Step 4: Identify the easternmost refinery
Digboi refinery (IV) is located in Tinsukia district in the extreme eastern part of Assam (Longitudinal location $\approx 95.6^\circ \text{ E}$).
Step 5: Formulate the West-to-East sequence
The correct order from West to East is:
Bongaigaon (III) $\rightarrow$ Guwahati (I) $\rightarrow$ Numaligarh (II) $\rightarrow$ Digboi (IV).
This corresponds to Option (D).
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