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Which of the following statement is correct about the program given below?

#include 
 int main() 
 {    
      int arr[] = {1, 2 ,3, 4, 5};  
      int &zarr = arr;    
      for(int i = 0; i 4; i++)    
      {         
         arr[i] += arr[i];    
     }   
     for(i = 0; i 4; i++)     
         cout
    return 0; 
 }