Q26

Consider the following program: int main() { f1 (); f2(2); f3(); return (0); } int f1 () { return(1); } int f2 (int X) { f3(); if (X==1) return f1 (); else return (X * f2 (X - 1)); } int f3 () { return (5); } Which one of the following options represents the activation tree corresponding to the main function?