In terms of polar character which one of the following orders is correct?

(A) NH₃ < H₂O < HF <H₂S

(B) H₂S < NH₃ < H₂O < HF

(C) H₂O < NH₃ < H₂S < HF

(D) HF < H₂O < NH₃ <H₂S

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  void foo(int x, int y)
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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 ((() ()) ())

  S → SSS → (S)S → ε

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  (C) 12
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