What is printed by the following ANSI C program?

#include<stdio.h>

int main(int argc, char *argv[])

{

int a[3][3][3] =

{{1, 2, 3, 4, 5, 6, 7, 8, 9},

{10, 11, 12, 13, 14, 15, 16, 17, 18},

{19, 20, 21, 22, 23, 24, 25, 26, 27}};

int i = 0, j = 0, k = 0;

for(i = 0; i < 3; i++ ){

for(k = 0; k < 3; k++ )

printf("%d ", a[i][j][k]);

printf("\n");

}

return 0;

} 

The correct answer is option 1.

Concept:

An array is defined as a collection of data items of the same type that are stored in contiguous memory locations. Arrays are derived data types in the C programming language that can store primitive data types such as int, char, double, float, and so on.

In C programming, you can create an array of arrays. These arrays are known as multidimensional arrays.

syntax:

int a[size1][size2][size3];

Total number of elements in array 'a' is= size1 x size2 x size 3

Three-dimensional array:

A three-dimensional array is a multi-dimensional array (array of arrays). A 3D array is made up of 2D arrays. Three subscripts are used to specify it: block size, row size, and column size. More dimensions in an array mean that it can store more data.

Explanation:

a[0] 2 Dimension:

a[0][0][0]=1
a[0][0][1]=2
a[0][0][2]=3

a[0][1][0]=4
a[0][1][1]=5
a[0][1][2]=6

a[0][2][0]=7
a[0][2][1]=8
a[0][2][2]=9

a[1] 2 Dimension:
a[1][0][0]=10
a[1][0][1]=11
a[1][0][2]=12

a[1][1][0]=13
a[1][1][1]=14
a[1][1][2]=15

a[1][2][0]=16
a[1][2][1]=17
a[1][2][2]=18

a[2] 2 Dimension:
a[2][0][0]=19
a[2][0][1]=20
a[2][0][2]=21

a[2][1][0]=22
a[2][1][1]=23
a[2][1][2]=24

a[2][2][0]=25
a[2][2][1]=26
a[2][2][2]=27

The for loop has prints:

a[000] = 1 ,a [001] = 2, a[002] = 3, a[100] = 10, a[101] = 11, a[102] = 12, a[200] = 19, a[201] = 20, a[202] = 21

Hence the correct answer is 

1 2 3

10 11 12

19 20 21