If tangents are drawn from the point $(5, -3)$ to the circle $x^2 + y^2 = 10$,then the equation of the chord of contact is:
- A$5x - 3y = 10$
- B$3x + 5y = 10$
- C$5x + 3y = 10$
- D$3x - 5y = 10$
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