The resultant of two vectors `P` and `Q`. If the vector `Q` is reversed, then the resultant becomes `S`, then choose the correct option.
A. `R^(2)+S^(2)=2(P^(2)-Q^(2))`
B. `R^(2)+S^(2)=2(P^(2)+Q^(2))`
C. `R^(2)+S^(2)=(P^(2)-Q^(2))`
D. `R^(2)-S^(2)=2(P^(2)+Q^(2))`
