What is the output of the following code ?#include <stdio.h>#include <string.h>int main() {    char str1[] = "Hello";    char str2[] = "World";    char str3[20];    strcpy(str3, strrev(strcat(str1, str2)));    printf("%s", str3);    return 0;}

The output of the code will be "dlroWolleH".

Here's the step by step explanation:

1. The code declares three character arrays: str1, str2, and str3. str1 is initialized with the string "Hello", and str2 is initialized with the string "World". str3 is an empty array with a size of 20 characters.

2. The strcat function concatenates str1 and str2, resulting in str1 being "HelloWorld".

3. The strrev function reverses the string "HelloWorld" to "dlroWolleH".

4. The strcpy function copies the reversed string "dlroWolleH