Which of the following function headers is correct?def fun(a = 2, b = 3, c)def fun(a = 2, b, c = 3)def fun(a, b = 2, c = 3)def fun(a, b, c = 3, d)

In Python, default parameters must come after non-default parameters in the function definition. Let's analyze the provided options:

1. Option 1: def fun(a = 2, b = 3, c)

   • Incorrect because default parameters (a and b) come before a non-default parameter (c).

2. Option 2: def fun(a = 2, b, c = 3)

   • Incorrect for the same reason; default parameter a comes before non-default parameter b.

3. Option 3: def fun(a, b = 2, c = 3)

   • Correct because non-default parameter a comes first, followed by default parameters b and c.

4. Option 4: def fun(a, b, c = 3, d)

   • Incorrect because default parameter c comes before non-default parameter d.

Final Answer

The correct function header is: def fun(a, b = 2, c = 3).