GATE EXAM PREPARATION IN "C" - C function(GATE CS 2004)

Consider the following C function:

int f(int n) {    static int i = 1;    if (n >= 5)       return n;    n = n+i;    i++;    return f(n); }

The value returned by f(1) is 
a) 5
b) 6
c) 7
d) 8

Answer (c)
Since i is static, first line of f() is executed only once.

Execution of f(1) 
    i = 1
    n = 2
    i = 2
 Call f(2) 
    i = 2
    n = 4
    i = 3
 Call f(4) 
   i = 3
   n = 7
   i = 4
 Call f(7)
  since n >= 5 return n(7)