Which of the following sequences is correct for the human respiratory system?

• A
  External nostrils $\rightarrow$ Nasal cavity $\rightarrow$ Internal nostrils $\rightarrow$ Larynx $\rightarrow$ Pharynx $\rightarrow$ Trachea $\rightarrow$ Primary bronchi $\rightarrow$ Secondary bronchi $\rightarrow$ Tertiary bronchi $\rightarrow$ Terminal bronchiole $\rightarrow$ Alveoli
• B
  External nostrils $\rightarrow$ Nasal cavity $\rightarrow$ Internal nostrils $\rightarrow$ Pharynx $\rightarrow$ Larynx $\rightarrow$ Trachea $\rightarrow$ Primary bronchi $\rightarrow$ Secondary bronchi $\rightarrow$ Tertiary bronchi $\rightarrow$ Terminal bronchiole $\rightarrow$ Alveoli
• C
  External nostrils $\rightarrow$ Nasal cavity $\rightarrow$ Internal nostrils $\rightarrow$ Pharynx $\rightarrow$ Trachea $\rightarrow$ Larynx $\rightarrow$ Primary bronchi $\rightarrow$ Secondary bronchi $\rightarrow$ Tertiary bronchi $\rightarrow$ Terminal bronchiole $\rightarrow$ Alveoli
• D
  None of these