Question

Which of the following is not an example of reflex action?

• A. Dilating of pupil when light falls on it
• B. Coughing when some irritant enters the nasal cavity
• C. Blinking of eyes
• D. Sudden jerky withdrawal of hand or leg when pricked by a pin.

Answer 1

The correct option is C Blinking of eyes

Blinking of eyes is not a reflex action, but it is involuntary action. A reflex action is one which occurs spontaneously whereas involuntary action happens without the conscious choice of an organism. The way the iris in our eye adjusts the size of the pupil in response to sudden bright or dim light is a reflex action. But blinking of eyes is an involuntary action.