the complete question in the attached figure
we have that
f(x)=x²-5x+6
and g(x) has a vertex at (2,4) and the parabola opens downwards
using a graph tool
see the attached figure
statements
a) The y-intercept of function f is less than the y-intercept of function g
this is not correct, because the y-intercept of function f is greater than the y-intercept of function g
b) The minimum of function f is at (-5,6)
this is not correct, because the minimum of function f is at (2.5,-0.25)
c)The y-intercept of function f is greater than the y-intercept of function g
this is correct
d) The minimum of function g is at (2,4)
this is not correct because the maximum of function g is (2,4)
the answer is the option
The y-intercept of function f is greater than the y-intercept of function g