Memory Allocation - C Programming Questions and Answers

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Point out the correct statement which correctly free the memory pointed to by 's' and 'p' in the following program?

 #include
 #include 

  int main() 
  {   
       struct ex    
       {       
          int i;    
          float j;  
          char *s  
      }; 
      struct ex *p;  
      p = (struct ex *)malloc(sizeof(struct ex));   
      p->s = (char*)malloc(20);   
      return 0;
  }