A natural killer cell recognizes cancer cells by

Options :
  1. their location
  2. their accelerated growth rate
  3. their altered cell surface proteins
  4. all the above

Answer and Explanation :-

Answer: Option 3


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the man who succeeds is the man who is able to reduce problems to their simplest terms and who has the courage of his convictions - despite the objections of intellectuals. The courage to speak, perhaps, even when he believes that what he is suggesting sounds like madness.
-Philip Kerr A Man Without Breath