Both the first and second statements are true and therefore Option D is the correct answer .
What is a Function ?
A function can be defined as the equation that identifies relation between a dependent variable and an independent variable.
A function always has a defined range and domain.
In the following statements
I. If f '(c) = 0, then f has a local maximum or minimum at x = c.
f'(c) = 0
It means that the slope of f(x) = 0 at x = c
If f has a local maximum or minimum at x = c  It is a True statement
II. If f is continuous on [a, b] and differentiable on (a, b) and f '(x) = 0 on (a, b), then f is constant on [a, b].
If f'(x) = 0 on (a, b),
then f is neither increasing nor decreasing
and therefore is constant on [a, b]
So it is a True statement.
III. The Mean Value Theorem can be applied to f(x) = 1/x² on the interval [−1, 1].
No the theorem cannot be applied as, f is neither continuous nor differentiable at x = 0
It is a False Statement.
Therefore Option D is the correct answer.
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