Which of the following are the evidences of the phenomenon of continental drift?
- I.The belt of ancient rocks from Brazil coast matches with those from Western Africa.
- II.The gold deposits of Ghana are derived from the Brazil plateau when the two continents lay side by side.
- III.The Gondwana system of sediments from India is known to have its counterparts in six different landmasses of the Southern Hemisphere.
Select the correct answer using the code given below.
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Answer: C. All three appear in NCERT as evidence of continental drift. Statement I is correct: 2-billion-year-old rock belts on the Brazil coast match those of West Africa. Statement II is correct: the gold deposits of Ghana are placer deposits derived from the Brazil plateau, as the two continents once lay side by side (Ghana has no source rock for them). Statement III is correct: India's Gondwana sediments have counterparts in six landmasses of the Southern Hemisphere. So I, II and III.
Watch for: Statement II on Ghana's gold looks odd, but it is NCERT's 'placer deposits' evidence, word for word.
Why the other options are wrong
- A. Wrong because Statement II (placer gold of Ghana) is also evidence.
- B. Wrong because Statement III (Gondwana sediments) is also evidence.
- D. Wrong because Statement I (matching rock belts) is also evidence.
Source to check: NCERT Class 11 Fundamentals of Physical Geography, chapter 'Distribution of Oceans and Continents'
Answer from the official UPSC key. Written and fact-checked by AI against the official key. Spotted a mistake? Report it.