Consider the following C program. Assume parameters to a function are evaluated from right to left.#include <stdio.h> int g(int p) { printf("%d", p); return p; } int h(int q) { printf("%d", q); return q; } void f(int x, int y) { g(x); h(y); } int main() { f(g(10),h(20)); }Which one of the following options is the CORRECT output of the above C program?

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

1. Evaluation of arguments in main(): The function call is f(g(10), h(20)). Since parameters are evaluated from right to left:

   • First, h(20) is called:

     • It executes printf("%d", 20); which prints 20.

     • It returns 20, so the second argument $y = 20$.

     • *Current output:* 20

   • Next, g(10) is called:

     • It executes printf("%d", 10); which prints 10.

     • It returns 10, so the first argument $x = 10$.

     • *Current output:* 2010

2. Execution inside f(10, 20):

   • g(x) is executed with $x = 10$:

     • It executes printf("%d", 10); which prints 10.

     • *Current output:* 201010

   • h(y) is executed with $y = 20$:

     • It executes printf("%d", 20); which prints 20.

     • *Current output:* 20101020

Thus, the final output printed on the screen is 20101020, which corresponds to option (A).