Copd emphysema

Which of the following best corresponds to the definition of Chronic Bronchitis?

1: Productive cough for at least two consecutive months in at least three consecutive years.
2: Productive cough for at least two consecutive years with no designated monthly requirement.
3: Productive cough for at least three consecutive months in at least two consecutive years.
4: Productive cough for at least three consecutive months in at least three consecutive years.