Question
Name some effective safety measures against cyclone?
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| Column I | Column II |
| A plane mirror | Used as a magnifying glass. |
| A convex mirror | Can form image of objects spread over a large area. |
| A convex lens | Used by dentists to see enlarged image of teeth. |
| A concave mirror | The image is always inverted and magnified. |
| A concave lens | The image is erect and of the same size as the object. |
| The image is erect and smaller in size than the object |