Air is breathed through

• A.  Trachea - lungs - larynx - pharynx - alveoli
• B.  Nose - larynx - pharynx - bronchus - alveoli -bronchioles
• C.  Nostrils - pharynx - larynx - trachea - bronchi -bronchioles - alveoli  
• D.  Nose - mouth - lungs