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B
Pfeffer
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C
Ganong
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D
Dixon
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Solution
The correct option is A Bose Crescograph is a device used for measuring growth in plants. It was invented by Sir J. C. Bose. He used clockwork gears and a glass plate to record the movement of the tip of a plant. He used crescograph to measure plant response to various stimuli and thereby scientifically proved that plants have life.