If (2, 0) is the vertex and y-axis the directrix of a parabola, then its focus

Question -

If (2, 0) is the vertex and y-axis the directrix of a parabola, then its focus is

Options:

A . (2, 0)

B . (-2, 0)

C . (4, 0)

D . (-4, 0)

Answer: Option C
:
C

Vertex = (2,0) $\Rightarrow$ focus is (2+2 ,0) = (4,0).

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