Question

The victim’s involuntary responses to stimulus proved that he was still living. These responses are known as ..............

• A. reactions
• B. reflexes
• C. feedback
• D. communication

Hint:

In science questions, choose the most precise term — here, "reflexes" is more accurate than the broader "reactions."

Answer 1

The Correct Option is B

The clue in the sentence is "involuntary responses to stimulus." In biology and physiology, such automatic, unconscious reactions to external stimuli are called reflexes.
Option (A) "reactions" is a broader term that includes both voluntary and involuntary responses, but it is less precise here.
Option (C) "feedback" usually refers to information given in response to an action, not biological stimulus-response actions.
Option (D) "communication" is unrelated to involuntary bodily movements.
Thus, (B) "reflexes" is the exact scientific term for such involuntary bodily responses, confirming signs of life.