Eustachian tube connects $A$ cavity with $B$. Choose the correct option for $A$ and $B$.

  • A
    $A-$ outer ear; $B-$ pharynx
  • B
    $A-$ inner ear; $B-$ pharynx
  • C
    $A-$ pinna; $B-$ pharynx
  • D
    $A-$ middle ear; $B-$ pharynx

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