Which of the following effects of –NO₂ group operates on –NH₂ group in this molecule?

(A) Only –I effect 

(B) Only +M effect 

(C) Only –M effect 

(D) Both –I and –M effect

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  void foo(int x, int y)
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  y+=x;
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  }
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  (B) 5 and 12
  (C) 5 and 20
  (D) 12 and 20
  
  

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• What is the number of steps required to derive the string ((() ()) ())

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