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A 5-year-old boy with breathing difficulty chest pain, and cough was admitted to a local hospital. The pediatrician who examined the boy, along with laboratory results, diagnosed the child as having cystic fibrosis. Which of the following structures is most likely blocked?
(A) Trachea
(B) Primary bronchus
© Secondary or lobar bronchi
(D) Terminal bronchioles
(E) Alveolar duct

cc

trachea,

trachea

no

ans please

is it BBB ?

B

e is correct

In Robbins Pathologic basis of diseases they say that the obstruction is in the bronchi and bronchioles, .... where did u get this question from ?