1
The diagram shows the formation of the shadow of an object.
What are the parts of the shadow labeled with X and Y?
| X | Y | |
| A | Penumbra | Umbra |
| B | Umbra | Penumbra |
| C | Antumbra | Umbra |
| D | Penumbra | Antumbra |
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A
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B
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C
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D