Acute bronchitis: It is the inflammation of bronchi. It usually lasts about two weeks and patient recovers with no permanent damage to the bronchi. Chronic bronchitis: In chronic bronchitis the bronchi develop chronic inflammation. It usually lasts for three months to two years. Correct Answer Acute bronchitis: It is the inflammation of bronchi. It usually lasts about two weeks and patient recovers with no permanent damage to the bronchi. Chronic bronchitis: In chronic bronchitis the bronchi develop chronic inflammation. It usually lasts for three months to two years.