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UPSC 2025 · Q25 · Geography › Physical Geography & Geomorphology · Save

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.

(a) I and III only
(b) I and II only
(c) I, II and III
(d) II and III only
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Answer: (c) I, II and III
UPSC 2025 · Q28 · Geography › Physical Geography & Geomorphology · Save

Consider the following statements :

Statement I : In the context of effect of water on rocks, chalk is known as a very permeable rock whereas clay is known as quite an impermeable or least permeable rock.

Statement II : Chalk is porous and hence can absorb water.

Statement III : Clay is not at all porous.

Which one of the following is correct in respect of the above statements?

(a) Both Statement II and Statement III are correct and both of them explain Statement I
(b) Both Statement II and Statement III are correct but only one of them explains Statement I
(c) Only one of the Statements II and III is correct and that explains Statement I
(d) Neither Statement II nor Statement III is correct
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Answer: (c) Only one of the Statements II and III is correct and that explains Statement I