Consider the following C program segment.#include <stdio.h> int main() { char s1[7] = "1234", *p; p = s1 + 2; *p = '\0'; printf("%s", s1); }What will be printed by the program?

Let us trace the execution of the program step by step:

1. char s1[7] = "1234"; initializes an array of characters where:

   • s1[0] = '1'

   • s1[1] = '2'

   • s1[2] = '3'

   • s1[3] = '4'

   • s1[4] = '\0', and remaining elements are zero-initialized.

2. p = s1 + 2; assigns pointer p to point to s1[2] (the character '3').

3. *p = '\0'; replaces the character at s1[2] with the null terminator character '\0'.

4. When printf("%s", s1); is called, it prints the string starting from s1[0] until it encounters the first null character '\0', which is now at index 2.

Therefore, only "12" is printed.

Hence, option (A) is correct.