Answer:
Axis of the symmetry is x=2.
Explanation:
Given :
Equation of a parabola in vertex form.
⇒ 

Note:
Axis of symmetry divides the parabola in two equal halves.
General vertex form y=a(x−h)^2+k 
And the axis of symmetry (x)= h
Comparing our values with the vertex form.
We can say that.
⇒a= 

⇒h= 
 and
 and 
⇒k= 

Axis of symmetry is (x) = h=2
Axis of symmetry of the parabola is x = 2.
Option C is the right answer.