Editor
The coordinates of the point on parabola $y^{2}=8x$ whose distance from focus is 4, are:
Difficulty: Easy
A: 
(2,4) and (2,-4)
B: 
(4,2) and (4,-2)
C: 
(1,4) and (1,-4)
D: 
(4,1) and (4,-1)
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