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A sudden, automatic response to a stimulus, such as pulling the hand off a hot object, is called

Aa reflex action
Ba voluntary action
Ca tropic movement
Da conditioned habit
Answer & Solution
Correct answer: A. a reflex action
1. Some responses are immediate and do not need conscious thought. 2. Such quick, automatic responses are **reflex actions**. 3. They protect the body from harm faster than the brain could react. _Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch7 'Control and Coordination', §7.1.1_
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