___ was a Russian scientist who investigated conditioning.
A
Mikhail Lomonosov
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B
Ivan Pavlov
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C
Nikolay Yegorovich Zhukovsky
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D
Igor Kurchatov
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Solution
The correct option is B Ivan Pavlov Ivan Pavlov (1849 to 1936) was a Russian scientist who investigated conditioning. He discovered that dogs produced extra saliva when they were offered food. This is a natural response to a stimulus - food makes a dog's mouth water.