OPSC OAS 2024 PrelimsOdisha SpecificQuestion 4
Solved previous year question from the OPSC OAS/OCS 2024 Preliminary Examination (General Studies), with the official answer key and a detailed explanation.
Question
Consider the following statements marked as Assertion (A) and Reason (R), and select the correct option using the codes given below:
Assertion (A): In central and southern Odisha, the Proterozoic era is represented by the Eastern Ghats Granulite Belt, which consists of khondalite, charnockite, migmatite, anorthosite and alkaline rocks.
Reason (R): These rock formations are linked to the mineralisation of bauxite, manganese, graphite, and gemstones.
Tap an option to check your answer.
Show answer & explanation
Answer & Explanation
Correct answer: (A) Both A and R are true, and R correctly explains A
| Statement | Analysis |
|---|---|
| Assertion (A) | The Eastern Ghats Granulite Belt in central and southern Odisha is indeed from the Proterozoic era and consists of high-grade metamorphic rocks including khondalite, charnockite, migmatite, anorthosite, and alkaline rocks. |
| Reason (R) | These Proterozoic rock formations are directly associated with economically important mineralisation of bauxite, manganese, graphite, and gemstones (sapphire, garnet, etc.) in Odisha. |
| Relationship | The geological composition (R) correctly explains why these formations (A) are economically significant and geologically important. |
