What is the following is invalid header file in C?*

How do you include a header file in a C program?OptionsUsing the #define directiveUsing the #pragma directiveUsing the #include directive

Point out the error line in the following program.1    #include <iostream>2    using namespace std;3    void main()4    {5    long int num = 10;      6    long int *ptr;                  7    cout<<"num's address :"<< &num<<"\n";   8    ptr = &num;9    cout<<"pointer's address :"<< &ptr<<"\n";   10  cout<<"pointer's size bytes "<< sizeof(ptr)<<"\n";  11  cout<<"pointer's value: "<< ptr<<"\n";   12  cout<<"value pointed to: "<< *ptr<<"\n";  13  return 0;14  }Select one:Line number 5Line number 12Line number 3Line number 10

Which of the following is an invalid identifier in C?

Marks the statements below about header files, as True/False.Read the spellings carefullyTrue False The stdio.h contains#ifndef _STDIO_H#define _STDIO_H    1as the first two lines,It is done to prevent  multiple inclusions of the same header files. #include <stdio.h>means copy paste the header file stdio.h in the place of the above line It's a common practice to move code of some of the functions to header files, and then #include those files, whenever needed. stdio.h contains the code for scanf(), printf() and getchar(). #include "my.h"means copy the file my.h from /usr/include, and paste it in the program, in place of the above line. The typical location for header files on Linuxes is /user/includes/headers/ Header files typically contain pre-processor directives, typedefs, and function prototypes only

In C language, FILE is of which data type?None of the abovestructintchar*