Solve the Radical Equation, If Possible $$6 = \sqrt { x ^ { 2 } + 3 } - x$$

Multiple Choice

Solve the radical equation, if possible. $$6 = \sqrt { x ^ { 2 } + 3 } - x$$

A) $\left\{ - \frac { 11 } { 4 } \right\}$
B) $\left\{ \frac { 13 } { 2 } \right\}$
C) $\left\{ \frac { 13 } { 4 } \right\}$
D) \{ \}