For brain cells,ammonia is very toxic because:

  • A
    Ammonia ($NH_4^+$ ions) affects brain cell functioning by changing the polarity of the cell membrane.
  • B
    Ammonia is not very toxic to cells other than brain cells.
  • C
    Ammonia is highly stable in brain cells.
  • D
    Ammonia penetrates the cell membrane of brain cells.

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