Which of the following actions are reflex actions?

• I. Movement of the diaphragm during respiration
• II. Coughing
• III. Yawning
• IV. Sneezing
• V. Removal of hand on being touched by hot object

A. II and V only

B. III, IV and V only

C. IV and V only

D. I, II, III, IV and V

Reflex actions are automatic responses to stimuli that occur without conscious thought. Let's analyze the options provided:

Identifying Reflex Actions

• Movement of the diaphragm during respiration: This is a controlled action, not a reflex.
• Coughing: This is a reflex action to clear the airways.
• Yawning: This is generally a voluntary action, though it can sometimes be triggered reflexively.
• Sneezing: This is a reflex action to expel irritants from the nasal passages.
• Removal of hand on being touched by a hot object: This is a classic example of a reflex action.

Conclusion on Options

Based on the analysis, the reflex actions are:

• Coughing (II)
• Removal of hand on being touched by a hot object (V)
• Sneezing (IV)

Thus, the correct answer is A. II and V only.