please describe in details.,. with an example

15. Consider the following code fragment: if (fork ( ) 0) = { a + 5; printf("%d,%d ", &a); } = a a, else { a = a- 5; printf("%d,%d ", a, &a); } Let u, v be the values printed by the parent process, and x, y be the values printed by the child process. Which one of the following is TRUE? (a) u = x + 10 and v = y (b) u = x + 10 and v != y (c) u + 10 = x and v = y (d) u + 10 = x and v-y