1
The diagram below shows an experiment to study the need of sunlight for photosynthesis.
The test for starch is done for area P and area Q after three days. What is the result of the experiment?
| P | Q | |
| A | Turns blue-black | Turns blue-black |
| B | Turns green | Turns yellow |
| C | Turns white | Does not turn white |
| D | Turns blue-black | Does not turn blue-black |
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A
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B
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C
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D