If $$x_1$$ and $$x_2$$ are the roots of the equation $$x^{2} - 4x - c = 0$$ and $$5x_1 - x_2 = 38$$, which of the following statements is true?

A

c = 21

B

$$x_1 = -7$$, $$x_2 = 3$$

C

$$x_1 = 6$$, $$x_2 = -2$$

D

None of these