i. Obsidian is an igneous rock. |
ii. Granite is a sedimentary rock. |
iii. Conglomerate is a metamorphic rock. |
iv. Gneiss is a metamorphic rock. |
A) i, ii and iii
B) ii and iii
C) i and iv
D) ii, iii and iv
E) None of these
Correct Answer: C
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