First of all find the equation of normal to curve at (1, 0)
This is slope of tangent so slope of normal is -1.
So equation of line -> (y - 0) = (-1) * (x - 1) -> x + y = 1
This is the line intersection x-axis at (1, 0)
and y-axis at (0, 1)
, forming a right angle triangle with height = 1 unit
and base = 1 unit
So area = Answer(c)