Below is the code

int main() 
{
     int fd1, fd2;
     struct stat buff1, buff2;
     fd1 = open(“1.txt”, O_RDWR);
     fd2 = open(“2.txt”, O_RDWR | O_APPEND);
     lseek(fd1, 10000, SEEK_SET);
     write(fd1, “abcdefghij”, 10);
     write(fd2, “abcdefghij”, 10);
     fstat(fd1, &buff1);
     fstat(fd2, &buff2);
     printf(“ %d %d”, buff1.st_size, buff2.st_size);
     return 0;
}

Before running the program, the file 1.txt and 2.txt size is 20 each. What is the output?

A. 30 30

B. 100020 20

C. 100030 30

D. 100010 30

Answer: Option D