What is the equation of a circle with center at the origin and a point at (4, 3)?

_{
}(A) x^{2}+y^{2}=25

_{
}(B) x^{2}+y^{2}=9

_{
}(C) x^{2}+y^{2}=4

_{
}(D) x^{2}+y^{2}=3√5