ABC is a triangle right angled at C as shown in the figure above. Which one of the following is correct?

Options

A. `AQ^(2)+AB^(2)=BP^(2) +PQ^(2)`
B. `AQ^(2) +PQ^(2) =AB^(2) +BP^(2)`
C. `AQ^(2)+BP^(2) =AB^(2)+PQ^(2)`
D. `AQ^(2)+AP^(2) =BK^(2) +KQ^(2)`