Column A | Column B | ||
I. | Gypsum | A. | Pencil lead |
II. | Emerald | B. | Blackboard chalk |
III. | Graphite | C. | Light bulb |
IV. | Tungsten | D. | Gemstone |
A) I\[\to \]C, II\[\to \]D, III\[\to \]A, IV\[\to \]B
B) I\[\to \]D, II\[\to \]A, III\[\to \]C, IV\[\to \]B
C) I\[\to \]B, II\[\to \]D, III\[\to \]C, IV\[\to \]A
D) I\[\to \]B, II\[\to \]D, III\[\to \]A, IV\[\to \]C
E) None of these
Correct Answer: D
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