Answer: The correct answer is option B
Pursed lip breathing is pathognomic (diagnostic) for COPD
Explanation: Pursed lip breathing is a type of breathing technique that helps people living with asthma or COPD ( Chronic bronchitis and Emphysema) when they experience shortness of breath. It is done by inhaling deeply through the nose,hold the breath for as long as you count to 5 and then breathe out, or exhale, all of the air in your lungs through your mouth slowly and gently through pursed lips. Try to breathe out longer than your inhale.